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How to Make Chemex Coffee: A Detailed Guide

How to Make Chemex Coffee: A Detailed Guide

Brewing coffee with a Chemex is not just about making your morning cup; it's an art form that combines precision and patience, resulting in a coffee experience that is deeply rewarding. Known for its elegant design and exceptional clarity of coffee, the Chemex is a beloved tool among coffee aficionados. Here, I'll share not only the steps to make the perfect Chemex coffee but also personal insights gathered from years of refining this brewing method.

Understanding the Chemex Brew Method

The Chemex uses a pour-over method but is distinguished by its thick, bonded paper filter which is crucial for achieving the coffee's clean and flavorful profile. This filter is about 20-30% heavier than standard ones, effectively removing unwanted sediments and oils. The result is a sweeter, more vibrant cup of coffee. From personal experience, the difference in taste clarity between a Chemex and other brewing methods is noticeably significant, making it my preferred choice especially when I want to savor a new single-origin coffee.

Equipment Needed

  • Chemex Brewer (available in 3, 6, 8, or 10 cup sizes) - see all options
  • Chemex Bonded Filters - see all options
  • Coffee Grinder (a burr grinder is essential for consistency)
    • I appreciate the Eureka Mignon Crono Coffee Grinder for its user-friendly design and consistent grinding performance, making it an excellent choice for anyone's first grinder due to its straightforward functionality and reliable precision in achieving the ideal grind for various brewing methods.
  • Digital Scale for precise measurements
    • With numerous options available, any scale that measures in grams and includes a timer will suffice for your needs.
  • Gooseneck Kettle for controlled pouring
  • Timer
  • Fresh Coffee Beans (medium to light roast preferred)

Step-by-Step Brewing Guide


  • Heat water to about 205°F. This temperature is ideal for extracting the full flavor without burning the coffee or leaving it under-extracted.
  • Weigh out 42 grams of coffee. The 1:15 coffee-to-water ratio is a starting point; based on personal tastes, you might adjust this slightly.

Setting Up the Filter

  • Insert the Chemex filter with the thicker side toward the spout. This prevents the filter from collapsing, a tip I learned after a few early mishaps.
  • Rinse the filter with hot water. This not only warms the vessel but also gets rid of the paper taste. Always discard this water before brewing.

The Coffee Grind

  • Aim for a medium-coarse grind, similar to kosher salt. Through trial and error, I've found that a slightly finer grind helps enhance extraction, bringing out subtle floral and fruit notes in the coffee.

The Bloom

  • Pour 80-100 grams of water evenly to saturate the grounds and start your timer. Let the coffee bloom for up to a minute. During this time, the coffee releases CO2 and begins to expand, a process that's crucial for a well-rounded extraction.

The Pour

  • Continue pouring the water in a slow, steady spiral, starting from the center. Keep your pour focused and avoid the edges as much as possible. It’s a methodical process that I find quite meditative early in the morning.

The Finish

  • Once brewing is complete, remove the filter with the grounds. I recommend composting the used grounds as a way to minimize waste.

Tips for the Best Chemex Coffee

Quality of Ingredients:

Always use fresh, high-quality beans. The Chemex method highlights the bean's flavor profile, so each cup reflects the quality of your chosen coffee.

Optimal Water Temperature:

One of the first things I discovered was how crucial the right water temperature is. Between 195°F to 205°F is ideal for extracting the best flavor. Any hotter, and you risk bitterness; cooler, and your coffee might be underwhelming. A digital kettle has been a game-changer for me, ensuring consistent temperature every time.

Thorough Filter Rinsing:

I can't stress enough the importance of properly rinsing your Chemex filter. It removes the papery taste and preheats the glass, which helps maintain the coffee's brewing temperature. I make sure to pour hot water around the entire filter to ensure no spot is missed.

Importance of Grind Consistency:

Achieving the right grind consistency took some trial and error. A medium-coarse grind works best, and using a burr grinder helps achieve uniform size, enhancing the extraction process and flavor profile. Inconsistent grinds lead to inconsistent brews, something I learned the hard way.

Weighing for Precision:

Using a digital scale to measure coffee and water has significantly improved my brewing consistency. I follow a 1:15 coffee-to-water ratio, but precise measurements mean you can replicate your favorite brew accurately every time. It's about finding what tastes best and being able to repeat it.

Mastering the Bloom:

Understanding the blooming process was a breakthrough for me. Adding just enough water to saturate the grounds and waiting for about 30-45 seconds allows the coffee to release gases and expand. This leads to a more even and effective extraction, something visually satisfying and critical for flavor.

Controlled Pour Technique:

Investing in a gooseneck kettle improved my pour, allowing me to control the water flow better. Starting with a spiral from the center outwards avoids creating channels in the coffee grounds that can lead to under-extraction. This technique took some practice, but it's worth mastering for that perfect cup.

Avoiding the Edges:

I learned early on to avoid pouring water directly on the edges of the filter. It causes water to run down the sides, bypassing the coffee which dilutes the strength of the brew. Keeping the stream focused towards the center ensures all the coffee is properly extracted.

Timing the Drip:

I aim for a total brew time of around 4 minutes. If the coffee drips through too quickly or slowly, it's usually an indication that the grind size needs adjustment. Keeping an eye on the clock has helped me refine the grind to perfection.

Regular Cleaning:

Keeping the Chemex clean is essential not just for the coffee's taste but for the longevity of the brewer. I rinse mine after every use and do a deep clean with a specially formulated coffee equipment cleaner once a month to keep everything fresh and functioning well.

Preheating to Perfection:

Preheating the Chemex and my coffee mugs was a tip I picked up from another seasoned brewer. It keeps everything hot longer, ensuring that the coffee doesn't cool too quickly upon pouring. This small step makes a significant difference, especially on chilly mornings.

Tailor to Taste:

Finally, tweaking the variables like coffee-to-water ratio or grind size to suit personal taste has been crucial. The Chemex is forgiving in many ways, but it also allows for a lot of customization. Experimentation is part of the fun and leads to finding your perfect brew profile.

These personal insights have shaped my Chemex brewing experience, turning it into a ritual I look forward to each day. Each tip has been a lesson in patience and precision, culminating in consistently delicious coffee.

Cleaning and Maintenance

Regular cleaning is essential. I make it a habit to thoroughly rinse my Chemex with hot water after each use and occasionally use a mixture of vinegar and water for a deeper clean, especially if the glass begins to appear cloudy.


The Chemex method might require a bit more attention than other brewing techniques, but the reward is a uniquely clean and complex cup of coffee. It’s not just about the caffeine; it’s about the experience—from the ritual of brewing to the final sip. Embracing this method has transformed my morning routine into a cherished ritual, and I encourage every coffee lover to try it at least once. The nuanced flavors and soothing process are truly worth the effort.


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