How to Improve Your Chemex Cold Brew Method: A Comprehensive Guide

Cold brew coffee has become increasingly popular in recent years due to its smooth, rich flavor and lower acidity. The Chemex cold brew method is a popular way to make cold brew at home, but there are a few things you can do to improve your results. This article provides a comprehensive guide to improving your Chemex cold brew method, including tips on choosing the right coffee beans, grinding the coffee, preparing the Chemex, brewing the cold brew, and troubleshooting common problems.

Choosing the Right Coffee Beans

The first step to making great cold brew is choosing the right coffee beans. Look for high-quality coffee beans that are roasted for cold brew. Cold brew coffee tends to have a lower acidity and a smoother flavor, so you may want to choose a coffee bean with a medium or dark roast level. You can also experiment with different origins and flavor profiles to find a coffee bean that you enjoy.

Grinding the Coffee Beans

The grind size is also important for cold brew. You want to use a coarse grind, similar to what you would use for a French press. This will help to prevent the coffee from becoming bitter. If you grind your coffee too finely, it can clog the filter and make it difficult to pour the cold brew.

Preparing the Chemex

To prepare the Chemex for cold brew, start by placing a Chemex filter in the top of the Chemex. Make sure that the filter is properly seated and that there are no gaps between the filter and the Chemex. Then, add the ground coffee to the filter. You can use a kitchen scale to measure the coffee, or you can use the Chemex’s built-in measuring lines.

Brewing the Cold Brew

Once the Chemex is prepared, it’s time to brew the cold brew. Slowly pour cold, filtered water over the ground coffee, starting in the center and working your way out in a circular motion. Make sure to saturate all of the coffee grounds. Once you have added all of the water, cover the Chemex and place it in the refrigerator.

The ideal brewing time for cold brew is between 12 and 24 hours. The longer you brew the coffee, the stronger it will be. Once the cold brew is finished brewing, remove the filter and pour the cold brew into a serving container.

Filtering and Storing the Cold Brew

After brewing, you may want to filter the cold brew again to remove any sediment. You can use a fine-mesh strainer or a coffee sock for this. Once the cold brew is filtered, it can be stored in an airtight container in the refrigerator for up to two weeks.

Troubleshooting Common Problems

If you are having problems with your Chemex cold brew, there are a few things you can check.

  • Weak coffee: If your cold brew is weak, you may need to use more coffee or brew it for a longer period of time. You can also try using a finer grind size.
  • Bitter coffee: If your cold brew is bitter, you may need to use less coffee or brew it for a shorter period of time. You can also try using a coarser grind size.
  • Clogged filter: If the filter is clogged, you may need to use a coarser grind size or rinse the filter before using it.


By following the tips and techniques in this article, you can improve your Chemex cold brew method and make delicious, smooth cold brew coffee at home. Experiment with different coffee beans, grind sizes, and brewing times to find the perfect recipe for your taste.



How can I improve this Chemex cold brew method?

  • Grind size: Experiment with different grind sizes to find the one that suits your taste preferences. For cold brew in a Chemex, a medium to coarse grind is generally recommended. This helps to prevent over extraction and produces a smoother brew.
  • Brew time and ratios: Adjust the brew time and coffee to water ratio to achieve the desired strength and flavor. For a stronger brew, increase the coffee-to-water ratio or lengthen the brew time. Conversely, for a milder flavor, decrease the ratio or steep time. It’s a matter of personal preference, so don’t hesitate to experiment and fine-tune the variables.

In addition, you can enhance the overall experience by using high-quality, freshly roasted coffee beans, making sure your water is filtered and at the ideal temperature (about 200°F or 93°C), and allowing the brewed coffee to cool a bit before serving it over ice. These small adjustments can contribute to a more flavorful and enjoyable Chemex cold brew experience.

How can I make my Chemex better?

Step by Step

  1. Heat your water to 205 degrees by bringing it to a boil and letting it sit for 30 seconds.
  2. Unfold the Chemex filter and insert in the top of the brewer, making sure the 3-layered side of the filter is lined up with the pouring spout.
  3. Pour hot water around the inside of the filter for about 5 seconds.

What can I add to cold brew to make it better?

Here are 10 ways to make a great thing even better, from frothy coconut milk to cinnamon simple syrup.

  1. Flavored Simple Syrup. Granulated sugar won’t dissolve properly in any cold liquid, coffee included.
  2. Coconut Milk. That can of coconut milk can do a lot more than fill out your curry.
  3. Coconut Water.
  4. Ice Cubes, 2.0.

Can I use Chemex for cold brew?

s said, you can make cold brew coffee with a Chemex. The Chemex will be used to separate the ground coffee from the water. In a more traditional cold brew coffee recipe, you’ll be told to use a fine-mesh strainer with cheesecloth or a regular thin paper filter to strain out the ground coffee.

Does steeping cold brew longer make it stronger?

A Longer Method: 18h

Any self-respecting coffee expert would recommend steeping your cold brew for around 18 hours because this will not only give you a stronger but a much more robust flavor.

What is the best grind for Chemex?

medium coarse grind

The Chemex works very well for light, medium and dark roasts- even tea! Q | What type of grind should I use and why? A | One should use a medium coarse grind. This will allow for the best extraction and flow rate will brewing the coffee.

How do you make a Chemex filter?

Traditional Filter Folding Instructions

  1. Step 1: Fold the Chemex filter in half.
  2. Step 2: Place the funnel in the top portion of the Chemex coffeemaker, with 3 layers on the groove side.
  3. Step 3: Put coffee in the filter paper cone.
  4. Step 4: Refer to the brew instructions for remaining steps.

Why does my cold brew taste weak?

Cold brew is often diluted and/or served over ice. If you’ve added too much water or ice, it will taste weak. If the caffeine is there but the taste isn’t, the cold brew probably hasn’t steeped long enough. Caffeine dissolves in water much easier than other compounds in coffee beans.

Can I add sugar to cold brew?

Pour cooled down coffee into a cup and add 1/2 cup of more ice. Brown sugar simple syrup is what I add to my iced coffee but you can use any kind of simple syrup (including flavored) you like. Stirring sugar into a cold drink doesn’t do a great job in sweetening a drink since the sugar just sinks to the bottom.