How To Make Coffee In A Chemex: A Comprehensive Guide

The Chemex is a classic pour-over coffee maker designed in 1941 by Dr. Peter Schlumbohm. Its elegant glass design and ability to produce a clean, flavorful cup of coffee have made it a favorite among coffee enthusiasts. Making coffee in a Chemex involves a few key steps, including choosing the right beans, measuring and grinding them properly, and mastering the pour-over technique. In this comprehensive guide, we will walk you through the process of making coffee in a Chemex, from selecting the best beans to perfecting your brewing technique.

Quick Answer: How To Make Coffee In A Chemex

To quickly summarize, here is a brief overview of the steps involved in making coffee in a Chemex:

  1. Gather Your Equipment: You will need a Chemex, Chemex filter, freshly ground coffee, a kettle, and a timer.

  2. Prepare the Filter: Open the Chemex filter and place it in the Chemex with the multi-layered side facing the spout. Rinse the filter with hot water to preheat the Chemex and remove any paper flavors.

  3. Measure and Grind the Coffee: Weigh out the appropriate amount of coffee beans for your desired brew strength and grind them to a medium-coarse consistency.

  4. Bloom the Coffee: Add the ground coffee to the filter, pour a small amount of hot water over the grounds, and allow them to bloom for 30-45 seconds.

  5. Pour the Water: Slowly pour the remaining hot water in a circular motion over the coffee grounds, allowing them to steep and drip through the filter.

  6. Serve and Enjoy: Once all the water has filtered through, remove the filter and serve the coffee.

Now, let’s delve into each of these steps in more detail.

Choosing The Right Beans For Chemex Coffee

The foundation of any great cup of coffee is the beans. When it comes to making coffee in a Chemex, the quality and flavor profile of the beans you choose will significantly impact the final brew.

Consider The Roast Level

The Chemex brewing method is known for producing a clean, bright, and aromatic cup of coffee. With this in mind, consider opting for beans that showcase the unique characteristics of their origin and are roasted to a medium level.

Light Roast: Lighter roasts preserve the intrinsic flavors and nuances of the coffee beans. They often exhibit floral, fruity, and acidic notes, which can shine through beautifully when brewed in a Chemex. If you enjoy a more delicate and complex flavor profile, a light roast may be an excellent choice for your Chemex brew.

Medium Roast: Medium roasts strike a balance between the nuanced flavors of light roasts and the slightly bolder, caramelized notes of dark roasts. They can bring out a pleasant acidity and a well-rounded flavor, making them suitable for those who prefer a more balanced cup of coffee.

Consider The Origin And Flavor Notes

When selecting beans for your Chemex, consider the origin and flavor notes that appeal to you. Different coffee-growing regions produce beans with distinct flavor profiles, which can range from fruity and floral to chocolatey and nutty. Some popular coffee origins and their associated flavor notes include:

  • Ethiopia: Known for its vibrant and fruity coffees with notes of citrus, berry, and floral aromas.
  • Kenya: Often produces bright, complex coffees with flavors ranging from blackcurrant and grapefruit to a wine-like acidity.
  • Colombia: Colombian coffees are celebrated for their balanced profile, often exhibiting caramel sweetness, nutty undertones, and a gentle acidity.

Freshness Is Key

Regardless of the roast level or origin, prioritize using freshly roasted coffee beans. Freshly roasted beans retain their flavors and aromas much better than pre-ground coffee or beans that have been sitting on the shelf for an extended period. Look for a roast date on the packaging, and aim to use the beans within a few weeks of this date for the best results.

By choosing high-quality, freshly roasted beans that align with your flavor preferences, you can set the stage for a delicious Chemex brew.

Step-by-By-Step Instructions On How To Use A Chemex

Now that you’ve selected your beans, it’s time to walk through the step-by-step process of using a Chemex to brew coffee. From prepping the filter to mastering the pour-over technique, each step plays a crucial role in creating a rich and aromatic cup of coffee.

Gather Your Equipment

Before you begin brewing with a Chemex, it’s essential to gather all the necessary equipment. Here’s what you’ll need:

  • Chemex coffee maker
  • Chemex bonded filters
  • Freshly ground coffee
  • Kettle
  • Timer
  • Scale (optional but recommended for precise measurements)

Prepare The Filter

  1. Open the Filter: Open the Chemex bonded filter and place it in the top of the Chemex, ensuring that the side with three layers of paper is over the pouring spout.

  2. Rinse the Filter: Rinse the filter paper with hot water. This serves two purposes: it preheats the Chemex and removes any paper taste from the filter, ensuring that your coffee will not have any unwanted flavors.

Measure And Grind The Coffee

  1. Weigh the Coffee: Measure out the desired amount of coffee beans using a digital scale. A common starting point is a ratio of 1:16 (1 part coffee to 16 parts water), but you can adjust this based on your preferences.

  2. Grind the Coffee: Grind the coffee beans to a medium-coarse consistency. The grind should be slightly coarser than table salt to ensure an optimal extraction.

Bloom The Coffee

  1. Add the Ground Coffee: Place the ground coffee into the prepped Chemex filter, ensuring that it’s evenly distributed.

  2. Bloom the Coffee: Start your timer and pour a small amount of hot water (about twice the weight of the coffee grounds) over the grounds, just enough to saturate them. Allow the coffee to bloom for 30 to 45 seconds. During this time, the coffee will release carbon dioxide, creating a bubbly, foamy mass. This initial step prepares the grounds for the main extraction.

Pour The Water

  1. Begin Pouring: After the blooming period, slowly pour the remaining hot water over the coffee grounds in a circular motion. Start from the center and gradually spiral outwards, ensuring that all the grounds are evenly saturated.

  2. Maintain a Consistent Pour: Aim to maintain a slow, steady pour to ensure an even extraction. Avoid pouring directly onto the filter paper, as this can lead to uneven extraction and a less balanced flavor.

  3. Control the Pour Rate: Adjust your pouring speed to maintain a consistent water level in the filter. This technique helps regulate the extraction process and allows the flavors to develop harmoniously.

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Serve And Enjoy

Once you’ve poured all the water, allow the remaining brewed coffee to drip through the filter. Once the dripping has slowed down, remove the filter from the Chemex, dispose of the grounds, and serve the freshly brewed coffee.

Measuring And Grinding The Beans For Optimal Flavor

In the realm of coffee brewing, the process of measuring and grinding the beans is a crucial step that significantly impacts the taste and quality of the end product. When it comes to brewing coffee in a Chemex, achieving the ideal grind size and utilizing precise coffee-to-water ratios are key to producing a rich, flavorful, and well-balanced cup of coffee.

Measuring The Coffee

To accurately measure the coffee for your Chemex brew, consider investing in a digital scale. This enables you to measure the coffee by weight, providing a level of precision that volumetric measurements cannot match. A common starting point for coffee-to-water ratio in a Chemex is 1:16 – one part coffee to 16 parts water. However, this ratio can be adjusted based on personal preference.

When using a scale, simply place the Chemex on the scale, tare it to zero, and add the desired amount of coffee. This level of accuracy allows you to consistently replicate your preferred brew strength and flavor profile with each batch.

Grinding The Coffee

The grind size of your coffee beans is a critical factor that directly influences the extraction process and the resulting flavor profile of your coffee. For the Chemex, a medium-coarse grind is typically recommended to achieve optimal extraction and ensure a clean, nuanced brew.

When grinding your coffee beans for the Chemex, aim for a consistency slightly coarser than sea salt. This particular grind size facilitates a balanced extraction, allowing the water to interact with the coffee grounds and release flavors without over-extracting or under-extracting the coffee.

Investing in a quality burr grinder with adjustable settings is advantageous, as it allows you to precisely control the grind size and consistently achieve the ideal coarseness for your Chemex brew. As a general guideline, a grind size resembling coarse sand or kosher salt is a good starting point for the Chemex brewing method.

By paying close attention to the measurement and grind of your coffee beans, you can fine-tune the brewing process and unlock the full potential of your Chemex, resulting in a flavorful and aromatic cup of coffee.

Brewing coffee in a Chemex is as much an art as it is a science. By carefully selecting high-quality beans, mastering the grind size, and refining your pouring technique, you can unlock the full potential of this iconic brewing method. Whether you prefer bright, fruity Ethiopian coffees or balanced, nutty Colombian beans, the Chemex allows you to savor the unique flavors and aromas of your favorite coffee beans with unparalleled clarity.

As you embark on your Chemex coffee brewing journey, remember that experimentation and refinement are key to discovering your perfect cup of coffee. Pay attention to the subtleties of each step, from the bloom to the final pour, and don't hesitate to adjust the variables to match your taste preferences. With dedication and practice, you can consistently produce exceptional cups of coffee that reflect the nuances and complexities of your chosen beans, elevating your coffee experience to new heights.

The Importance Of Water Temperature And Quality

The Chemex is a popular pour-over coffee maker that not only brews a delicious cup of coffee but also serves as an elegant centerpiece for any coffee lover’s kitchen. The Chemex’s unique design, with its hourglass shape and wooden collar, allows for a slow, controlled extraction that brings out the intricate flavors and aromas of the coffee beans.

Before we dive into the brewing process, it is crucial to understand the importance of water temperature and quality. Water makes up the majority of your coffee, so using the right water can significantly impact the taste of your brew.

Firstly, ensure that you are using filtered water to eliminate any impurities or off-flavors that may affect the coffee’s taste. Tap water, especially if it is heavily chlorinated or contains excessive minerals, can lead to an unpleasant cup of coffee. Investing in a water filter or using bottled water can be a worthwhile step in improving your coffee brewing experience.

Secondly, pay attention to the water temperature. The ideal brewing temperature for coffee falls between 195 to 205 degrees Fahrenheit (90 to 96 degrees Celsius). Water that is too hot can result in over-extraction, leading to a bitter taste, while water that is too cold may result in under-extraction, producing a weak and watery cup.

To achieve the optimal temperature, heat the water in a kettle until it reaches a gentle boil, and then remove it from the heat source. Allow the water to cool for about 30 seconds to a minute before starting the brewing process. This slight drop in temperature will ensure that your coffee grounds are properly extracted, allowing the flavors to shine.

How To Properly Bloom The Coffee Grounds

The bloom is a crucial step in the brewing process that allows the coffee grounds to release trapped carbon dioxide gas, resulting in a more balanced and flavorful cup of coffee. This step is especially important when using freshly roasted coffee beans, as they tend to release a more significant amount of gas.

To properly bloom the coffee grounds in a Chemex, follow these steps:

  1. Start by placing a Chemex paper filter in the brewer. Rinse the filter with hot water to remove any paper taste and warm up the brewer.
  2. Discard the rinse water and add the desired amount of freshly ground coffee to the filter. The recommended coffee-to-water ratio is 1:15, which means you should use 1 gram of coffee per 15 grams of water. Adjust the ratio based on your personal preference.
  3. Slowly pour a small amount of hot water (around twice the weight of the coffee grounds) into the center of the coffee bed. Aim to saturate all the coffee grounds evenly, without touching the sides of the filter.
  4. Gently stir the coffee and water mixture with a spoon to ensure that all the grounds are fully saturated.
  5. Allow the coffee to bloom for around 30 seconds to a minute. During this time, you will notice a gentle bubbling and expansion of the coffee grounds. This is a sign that the trapped carbon dioxide is being released.
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Blooming the coffee grounds allows for a more thorough extraction and enhances the flavors in the final cup. It also helps to control the rate of extraction during the brewing process, making the coffee taste more balanced and nuanced.

The Pour-over Technique For Chemex Brewing

Now that the coffee grounds have bloomed, it’s time to start the pour-over process in the Chemex. This technique involves pouring hot water over the coffee grounds in a slow and controlled manner, allowing the water to extract the flavors from the beans.

To perform the pour-over technique for Chemex brewing, follow these steps:

  1. Start by pouring hot water into the Chemex to preheat it. This will help maintain a consistent brewing temperature throughout the process. Discard the preheating water.
  2. Place the Chemex with the bloomed coffee grounds on a scale. Tare the scale to zero to ensure accurate measurements.
  3. Begin pouring the hot water over the coffee grounds, starting from the center and slowly spiraling outwards in a circular motion. Aim to saturate all the grounds evenly and avoid pouring directly onto the filter to prevent channeling.
  4. Pour in a slow and steady stream, maintaining a consistent flow rate. Avoid pouring too fast, as this can lead to over-extraction, or too slow, resulting in under-extraction.
  5. Keep an eye on the water level in the Chemex and control the rate of pour accordingly. It is essential to maintain a constant water level to ensure consistent extraction.
  6. Once you have poured all the water, allow the coffee to drip through the filter until it reaches the desired brew strength. The total brew time for a Chemex is typically around four to six minutes.
  7. Once the coffee has finished brewing, remove the filter and discard it. Now you can enjoy your freshly brewed coffee from the Chemex.

Tips For Achieving The Perfect Brew Time

Achieving the perfect brew time is crucial in extracting the optimal flavors from your coffee beans. Here are a few tips to help you achieve consistent and delicious results:

  1. Grind your coffee beans to the appropriate size: The grind size plays a crucial role in the extraction process. For Chemex brewing, the grind should be similar to medium-coarse sand. A consistent grind size allows the water to flow evenly through the coffee bed, promoting an even extraction.

  2. Maintain a steady pour: Pouring too quickly can result in over-extraction, while pouring too slowly can lead to under-extraction. Aim for a steady and controlled pour to achieve consistent results. If needed, adjust the flow rate by varying the height from which you pour or the speed at which you pour.

  3. Experiment with your coffee-to-water ratio: The recommended coffee-to-water ratio is 1:15, but you can adjust it based on your personal preference. If you prefer a stronger cup of coffee, try using a higher coffee-to-water ratio. Likewise, if you prefer a milder cup, experiment with a lower ratio.

  4. Use a gooseneck kettle: A gooseneck kettle provides better control over the pour, allowing you to pour with precision and accuracy. The narrow spout of a gooseneck kettle helps to achieve a slow and consistent flow, contributing to a more even extraction.

  5. Keep track of your brew time: Timing your brew is essential to ensure consistency. Use a timer or a stopwatch to monitor the brew time from the moment you start pouring water until the final drip. Aim for a total brew time of four to six minutes for a Chemex.

  6. Adjust your grind size if needed: If you find that your coffee is consistently over-extracted or under-extracted, consider adjusting your grind size. Finer grinds increase the extraction rate, while coarser grinds slow it down. Experiment with different grind sizes until you find the sweet spot for your taste preferences.

Brewing coffee in a Chemex is an art form that requires attention to detail and a passion for great-tasting coffee. From properly blooming the coffee grounds to mastering the pour-over technique, each step contributes to the final cup's flavor and aroma. The Chemex's elegant design and slow extraction process make it a favorite among coffee enthusiasts.

Remember, always start with high-quality filtered water and pay heed to the brewing temperature to ensure a clean and well-extracted cup of coffee. Experiment with different coffee-to-water ratios, grind sizes, and pour-over techniques to find the perfect combination that suits your taste preferences. With practice and a bit of experimentation, you'll soon be able to brew a delicious cup of coffee in your Chemex that rivals your favorite café's offerings.

What Kind Of Filter To Use And Why It Matters

The Chemex is a popular brewing method for coffee enthusiasts who appreciate the clean and flavorful results it produces. This iconic hourglass-shaped coffee maker was invented by Peter Schlumbohm in 1941 and has been a timeless addition to kitchens and coffee shops ever since. Brewing coffee in a Chemex requires a few key steps to ensure the perfect cup of coffee, from selecting the right filter to experimenting with brewing ratios and techniques.

When it comes to brewing coffee in a Chemex, the type of filter you use plays a crucial role in the flavor profile of your coffee. Chemex filters are thick, bonded filters made of paper, and they come in natural or bleached options. Both options produce excellent results, but the natural filters may impart a slightly papery taste during the initial brews until they are rinsed properly. Here are the steps to follow when using a Chemex filter:

  1. Start by folding the square Chemex filter in half, and then fold it in half again to form a cone shape with three layers on one side and a single layer on the other side. The side with the three layers will go against the spout of the Chemex.

  2. Place the filter in the top of the Chemex, ensuring that the side with three layers covers the spout. The filter should fit snugly inside the Chemex.

  3. Rinse the filter with hot water to both remove any residual paper taste and preheat the Chemex. This step is essential to ensure the purest flavor in your coffee.

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Once you have rinsed the filter and preheated the Chemex, it is ready for brewing.

How To Clean And Maintain Your Chemex

Proper cleaning and maintenance of your Chemex are essential to ensure that it continues to produce great-tasting coffee. Follow these steps to clean and maintain your Chemex:

  1. After brewing, carefully discard the used coffee grounds and remove the filter.

  2. Rinse the Chemex thoroughly with warm water. Avoid using soap or any abrasive cleaning materials, as they can leave residue that affects the taste of your coffee.

  3. If any stubborn coffee stains persist, you can use a mixture of warm water and white vinegar or a small amount of baking soda to gently scrub the stains.

  4. Rinse the Chemex thoroughly with warm water again to remove any cleaning residue.

  5. Allow the Chemex to air dry before storing it. Some coffee enthusiasts prefer to keep the wooden collar and tie attached, as it adds an aesthetically pleasing touch to the brewing process. If the wooden collar and tie become loose or damaged over time, they can be replaced.

Experimenting With Different Brewing Ratios And Techniques

Coffee brewing is a personal and subjective experience, and the Chemex allows you to experiment with different brewing ratios and techniques to find your perfect cup. Below are a few popular brewing ratios and techniques to get you started:

  1. Ratio: The general ratio for brewing coffee in a Chemex is 1:15, meaning one part coffee to fifteen parts water. However, you can adjust this ratio to suit your taste preferences. If you prefer a stronger cup, you can increase the coffee grounds, or if you prefer a milder cup, you can decrease the coffee grounds.

  2. Grinding: The grind size of your coffee beans also affects the flavor and extraction. For the Chemex, a medium-coarse grind works best. It should resemble coarse sand. Finer grinds can clog the filter and result in over-extraction, while coarser grinds may not extract enough flavor.

  3. Pouring Technique: Start by adding the desired amount of coffee grounds to the filter and make a small well in the center. Begin the brewing process by pouring a small amount of water (approximately twice the weight of the coffee grounds) onto the coffee in a circular motion. Allow the coffee to bloom for about 30 seconds. Then, gradually pour the rest of the water in a slow, steady circular motion, saturating all the coffee grounds.

  4. Timing: Experiment with the steeping time to achieve your preferred flavor profile. The typical steeping time for a Chemex brew is around 3-4 minutes, but you can adjust this based on your taste preferences.

By experimenting with different brewing ratios, grind sizes, pouring techniques, and steeping times, you can fine-tune each brew to your liking.

Troubleshooting Common Issues With Chemex Brewing

Even experienced coffee brewers may encounter some challenges when using a Chemex. Here are a few common issues and their solutions:

  1. Slow Drip: If the coffee drips too slowly or clogs, it may indicate that the grind size is too fine. Adjust the grind size to be slightly coarser and try again.

  2. Fast Drip: On the other hand, if the coffee drips too quickly, it may signify that the grind size is too coarse. Adjust the grind size to be slightly finer and try again.

  3. Uneven Extraction: If you notice that the water is not evenly saturating the coffee grounds, it may be due to uneven pouring. Ensure that you pour the water in a slow, steady circular motion, saturating all the coffee grounds evenly.

  4. Bitter or Over-extracted Coffee: If your coffee tastes bitter or overly strong, it may be a result of over-extraction. Adjust the brewing time by decreasing the steeping time or using a coarser grind to prevent extracting too much from the coffee grounds.

  5. Weak or Under-extracted Coffee: If your coffee tastes weak or lacks flavor, it may indicate under-extraction. Lengthen the brewing time slightly, increase the coffee grounds, or use a finer grind to enhance extraction.

It may take a few attempts and adjustments to find the perfect balance that suits your taste preferences. Don’t be discouraged by initial challenges and keep experimenting until you find the brewing method that results in your ideal cup of coffee.


Brewing coffee in a Chemex is both an art and a science. With its elegant design and distinctive brewing process, the Chemex allows coffee lovers to extract the full flavor potential of their coffee beans. Remember to select the right filter, clean and maintain your Chemex regularly, and experiment with different brewing ratios and techniques to achieve the best results. As you dive into the world of Chemex brewing, don’t forget to enjoy the process and savor each cup of coffee you create.

FAQS On How To Make Coffee In A Chemex

What Is A Chemex?

A Chemex is a type of manual coffee brewing device that uses a glass carafe and a special filter to make a smooth and flavorful cup of coffee.

What Type Of Coffee Beans Work Best For A Chemex?

It is recommended to use medium to coarse ground coffee beans for a Chemex. These types of beans allow for a slower extraction and result in a more balanced and flavorful cup.

How Do I Properly Clean A Chemex After Use?

We recommend hand washing the Chemex with warm water and soap, making sure to thoroughly rinse and dry it afterwards. Avoid using harsh chemicals or abrasive sponges as they can damage the glass.

How Long Does It Take To Make Coffee In A Chemex?

The brewing process for a Chemex can take anywhere from 3-5 minutes, depending on the amount of coffee being brewed and the strength desired.

Can I Make More Than One Cup Of Coffee At A Time With A Chemex?

Yes, a Chemex can make up to 6 cups of coffee at a time. However, the recommended maximum is 4 cups to ensure the best flavor and extraction.