How to Use Chemex Filter Square

Are you a fan of pour-over coffee? Do you want to achieve the perfect cup of coffee at home? Then, the Chemex Filter Square is an essential tool for your brewing process. This unique filter creates a clean and smooth cup of coffee, allowing you to fully taste the flavors of your beans without any bitterness.

How to Use Chemex Filter Square

Using a Chemex filter square to brew coffee is an art that combines precision with simplicity, resulting in a rich and flavorful cup of coffee. The Chemex method, known for its distinctive hourglass-shaped vessel and thick filter paper, offers a unique brewing experience that highlights the complex flavors of the coffee beans.

By following a few easy steps, you can master the technique and enjoy a consistently excellent brew. In this guide, we’ll walk you through the process of how to use Chemex Filter Square, ensuring that you achieve the perfect brew every time.

What Will You Need?

Before we dive into the steps of using a Chemex Filter Square, let’s gather all the necessary tools and ingredients:

  • Chemex Filter Square
  • Chemex coffee maker
  • Freshly roasted coffee beans
  • Burr grinder (for grinding your beans)
  • Gooseneck kettle for precise pouring
  • Digital scale for accurate measurements
  • Hot water (ideally at around 200°F or 93°C)

Once you have everything ready, it’s time to start brewing!

Digital Scale for Accurate Measurements

10 Easy Steps on How to Use Chemex Filter Square

Step 1. Fold the Filter:

Start by folding the Chemex Filter Square. Open the filter along the seam, and you’ll have one side with three layers and one side with a single layer. Place the three-layered side against the spout of the Chemex coffee maker. This will help control the flow of coffee during the brewing process.

Step 2. Rinse the Filter:

Before adding the coffee grounds, rinse the Chemex filter with hot water. This step is crucial as it removes any paper residue and pre-heats the Chemex vessel, ensuring that your coffee stays at the optimal brewing temperature.

Carefully pour hot water around the filter, ensuring it is fully saturated. Once rinsed, discard the rinse water by pouring it out through the spout of the Chemex, holding the filter in place. This process not only cleans the filter but also helps it adhere to the walls of the Chemex, preventing any slippage during brewing.

Step 3. Measure and Grind the Coffee:

Using a digital scale, measure the desired amount of coffee beans. For a standard 6-cup Chemex, you’ll need about 42 grams of coffee. Once measured, grind the beans using a burr grinder to a medium-coarse consistency, similar to sea salt. The grind size is critical as it affects the rate of extraction and ultimately the flavor of your coffee.

Step 4. Add Coffee Grounds to the Filter:

After grinding your coffee beans to the right consistency, it’s time to add the coffee grounds to the Chemex filter. Gently pour the ground coffee into the filter’s center, allowing it to form an even bed. Level out the coffee grounds by giving the Chemex a light shake or tap. This leveling helps ensure an even extraction during brewing, which is crucial for achieving a balanced and flavorful cup of coffee.

Step 5. Bloom the Coffee:

Next Step is to Bloom the Coffee

The next step is to bloom the coffee, which involves saturating the grounds with hot water. Start by pouring approximately twice the weight of the coffee grounds in water (e.g., around 80-90 grams for 42 grams of coffee). Begin pouring slowly in a circular motion, starting from the center and working your way outwards, ensuring all the coffee grounds are evenly wet.

Allow the coffee to bloom for about 30-45 seconds. This step releases carbon dioxide from the coffee, which can affect the taste and quality of the final brew.

Step 6: Continue Pouring:

After the bloom, continue to pour hot water in slow, steady spirals, beginning at the center and moving outward and back again. Use a gooseneck kettle for better control and precision. Pour until you reach your desired total brew volume, usually around 700 grams for a 6-cup Chemex. Ensure you maintain a constant water level in the filter without allowing it to run dry.

Step 7. Wait for the Brew to Complete:

Once you have finished pouring the water, patience is key. Allow the coffee to drip through the filter at its own pace. This can take several minutes, depending on the grind size and the amount of coffee you are brewing. The brewing process is complete when the dripping slows down to a near stop and the water level in the filter has significantly decreased. It’s crucial not to rush this step, as the thorough extraction of flavors happens during this phase.

Step 8. Remove the Filter and Serve:

After the coffee has finished brewing, carefully remove the Chemex filter containing the spent coffee grounds and discard the filter and grounds properly. Now, you should have a beautifully brewed coffee, free of any sediment or overly bitter notes. Gently swirl the Chemex vessel to mix all the layers of the brewed coffee, ensuring an even consistency and flavor profile.

Step 9. Pour and Enjoy:

Pour the brewed coffee into your favorite mug or cup. Notice the clarity and aroma of the Chemex brewing method in the coffee. Sip slowly and savor the nuanced flavors that this brewing technique has helped highlight. Each cup should present a well-balanced and smooth taste, showcasing the profiles of your carefully selected beans.

Step 10. Clean Your Chemex:

It is cleaning your Chemex after brewing is essential to maintaining its performance and longevity. Rinse the Chemex thoroughly with warm water, removing any coffee residue. Use a brush designed for Chemex or a soft sponge to clean the interior, being cautious around the narrow neck. Avoid using harsh detergents that can leave a residue and affect the taste of future brews. Allow the Chemex to air dry completely before storing it away.

By following these steps, you can perfect the art of using a Chemex Filter Square and enjoy a consistently exceptional cup of coffee every time. The process may seem intricate at first, but with practice, it becomes a seamless ritual that enhances your appreciation for the finer details of coffee brewing.

5 Additional Tips and Tricks

Open One of the Flaps to Form a Cone Shape
  1. Fold the Filter Correctly: To ensure a proper fit and optimal extraction, fold the Chemex filter following the manufacturer’s instructions. Begin by folding it in half to create a semi-circle, then fold it again into a quarter circle. Open one of the flaps to form a cone shape and place the thicker side against the spout of your Chemex.
  2. Rinse the Filter: Before adding your coffee grounds, rinse the filter with hot water. This removes any potential papery taste and warms up the Chemex, helping maintain the brewing temperature.
  3. Use the Right Grind Size: Grind your coffee to a medium-coarse consistency for a perfect brew. A too-fine grind can lead to over-extraction and bitterness, while a too-coarse grind can result in weak and under-extracted coffee.
  4. Evenly Bloom the Coffee: After placing your coffee grounds in the rinsed filter, pour a small amount of hot water (about twice the weight of the coffee) to wet the grounds. Allow the coffee to bloom for about 30 seconds. This releases trapped gases and sets the stage for an even extraction.
  5. Pour in a Controlled Manner: Pour the hot water slowly and evenly over the coffee grounds in a circular motion. Begin in the center and move outwards, ensuring all grounds are saturated evenly. Avoid pouring directly onto the filter to prevent water from bypassing the coffee grounds.

5 Things You Should Avoid

  1. Using Unfiltered Tap Water: Always avoid using unfiltered tap water to brew your coffee. Chlorine and other impurities in tap water can significantly affect the taste of your coffee. Use filtered or bottled water to ensure a clean and pure flavor profile.
  2. Overfilling the Chemex: Avoid overfilling your Chemex with water. Overfilling can lead to spillage, uneven extraction, and a mess. Stick to the recommended water-to-coffee ratio for the best results.
  3. Boiling Water Directly on the Grounds: Pouring boiling water directly on coffee grounds can scorch them, resulting in a bitter taste. Allow the water to cool slightly after boiling, ideally to around 200°F (93°C), for the optimal extraction temperature.
  4. Skipping the Bloom Step: Don’t skip the blooming process. It’s essential to release carbon dioxide trapped within the coffee grounds and ensure an even extraction. Skipping this step can result in a flat and less flavorful cup of coffee.
  5. Stirring the Grounds Too Much: While it may be tempting to stir the coffee grounds during brewing, excessive stirring can lead to over-extraction and muddiness. Keep stirring to a minimum to maintain clarity and consistency in your coffee.
Don't Skip the Blooming Process

Conclusion

How to use chemex filter square can significantly elevate your coffee brewing experience. You can achieve a clean and flavorful cup of coffee by following the tips and tricks outlined above, from correctly folding and rinsing the filter to ensuring an even bloom and controlled pour.

Additionally, avoiding common pitfalls such as using unfiltered water, overfilling the Chemex, and skipping crucial steps like blooming will help in brewing consistently excellent coffee. With practice and attention to detail, using a Chemex filter square can become a seamless and enjoyable part of your daily coffee routine.

Hopefully, this guide has provided you with valuable insights and techniques to enhance your Chemex brewing skills. Happy brewing!

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Angela Ervin

Angela is the chief editor of Indoorense. She began her career as an interior designer before applying her strategic and creative passion to lifestyle and home. She has close to 15 years of experience in creative writing and online content strategy for housekeeping and cleaning,home decorations as well as other efforts. She loves her job and has the privilege of working with an extraordinary team. She lives with her husband, two sons, and daughter in Petersburg. When she's not busy working she spent time with her family.

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