How to Make Cold Brew Concentrate with a French Press

Quick Answer

To make cold brew concentrate in a French press, use a 1:4 coffee-to-water ratio, steep for 12-18 hours at room temperature or in the fridge, then press and dilute with water or milk to taste. This method yields a smooth, low-acid concentrate that's perfect for iced coffee.

Cold brew concentrate is the secret to a quick, refreshing iced coffee any time. With a French press, you can make a full-flavored concentrate at home without special equipment. The result is a smooth, low-acid base that you can dilute with water, milk, or a splash of vanilla for endless variations.

This guide walks you through the steps, from choosing the right coffee and ratio to steeping and storing your concentrate. We'll also share common pitfalls to avoid, so you get a clean, balanced cup every time.

Why Make Cold Brew Concentrate in a French Press?

A French press is one of the easiest tools for cold brew because it comes with a built-in filter. You don't need cheesecloth or a separate cold brew maker. Simply add coarse coffee grounds, water, steep, and press. The mesh filter catches the grounds, leaving you with a smooth concentrate that's ready to dilute.

Cold brew concentrate is stronger than regular cold brew, so a little goes a long way. This makes it economical: one batch can yield several servings. Plus, the French press's glass carafe is easy to clean and store in the fridge.

• Use a 1:4 coffee-to-water ratio for concentrate (e.g., 1 cup coffee to 4 cups water).
• Grind coffee coarse, like breadcrumbs, to prevent over-extraction and sludge.
• Steep for 12-18 hours; longer steeping increases strength but can add bitterness.

Choosing the Right Coffee and Ratio

The coffee you choose greatly affects the flavor of your concentrate. A medium roast with notes of chocolate and nuts works beautifully, as it holds up to dilution without turning sour. For a classic cup, look for an organic medium roast that's smooth and balanced.

The standard ratio for concentrate is 1 part coffee to 4 parts water by weight. For a milder brew, you can go up to 1:5. Using a kitchen scale ensures consistency. If you don't have a scale, use about 1/2 cup of whole beans (coarsely ground) per 2 cups of water.

• Weigh your coffee and water for the most consistent results.
• Adjust the ratio to your taste: 1:4 for strong concentrate, 1:5 for a lighter base.
• Pre-ground coffee works, but grinding fresh beans just before brewing gives the best flavor.

Step-by-Step Brewing Process

Start by adding your coarse ground coffee to the French press. Pour in cold, filtered water, making sure all grounds are saturated. Stir gently with a spoon to ensure even extraction. Place the lid on without pressing the plunger down, and let it steep at room temperature or in the fridge.

After 12-18 hours, press the plunger down slowly and carefully. If the plunger sticks, it's often because the grounds are too fine. Pour the concentrate into a glass jar or bottle, and store it in the fridge. It will keep for up to two weeks.

• Use cold or room-temperature water; hot water will extract more bitterness.
• Steep in the fridge if you prefer a cleaner, less acidic taste.
• Press slowly to avoid disturbing the grounds at the bottom.

Serving and Storing Your Concentrate

To serve, fill a glass with ice, then add equal parts concentrate and water or milk. For a sweeter drink, stir in a little vanilla syrup or honey. The concentrate is also great for making iced lattes: just add your favorite milk and a splash of vanilla.

Store your concentrate in a sealed glass container in the fridge. It stays fresh for up to two weeks. Shake or stir before using, as the concentrate can settle. If you prefer a stronger flavor, use less dilution; for a lighter cup, add more water.

• Dilute with water, milk, or a dairy-free alternative to taste.
• Try adding a pinch of salt to cut bitterness and enhance sweetness.
• Use a glass container with a tight lid to keep your concentrate fresh.

French Press Cold Brew Concentrate: Step-by-Step

1. Grind Your Coffee Coarse: Grind 1 cup of coffee beans to a coarse consistency, similar to breadcrumbs. This prevents over-extraction and keeps your concentrate smooth. Too fine a grind will make pressing difficult and can add bitterness.
2. Combine Coffee and Water: Add the ground coffee to your French press and pour in 4 cups of cold, filtered water. Stir gently to ensure all grounds are saturated. Stirring helps even extraction, so you don't end up with weak spots.
3. Steep for 12-18 Hours: Place the lid on without pressing the plunger, and let it steep at room temperature or in the fridge. The longer you steep, the stronger the concentrate. Steeping too long can make it bitter; start with 12 hours and adjust to taste.
4. Press and Strain: Press the plunger down slowly and steadily. If it resists, you may need a coarser grind next time. Pour the concentrate through a fine-mesh strainer to catch any remaining grounds. Straining gives a cleaner cup, especially if you used a finer grind.
5. Store and Dilute: Transfer the concentrate to a glass jar and refrigerate. To serve, mix equal parts concentrate and water or milk over ice. Your concentrate will keep for up to two weeks, so you can enjoy cold brew anytime.

Products That Make Cold Brew Easier

• Organic Medium Roast Cold Brew Singles: Smooth, balanced, and endlessly drinkable—our organic Medium Roast Single Serve is your go-to for an elevated everyday brew. With notes of milk chocolate and toasted nuts, it’s a classic cup made effortlessly convenient. These singles are pre-measured, so you skip the scale and guesswork. Just steep one in your French press with the right amount of water for a consistent concentrate every time.
• Round Cold Brew Mason Jar: Our Round Cold Brew Mason Jar is designed for easy brewing, effortless pouring, and everyday aesthetic appeal. Made from durable, crystal-clear glass with a snug seal, it keeps your coffee fresh while looking great on your counter or in your fridge. This Mason Jar is not heat resistant and is for cold beverages only. We recommend our Double Wall Mug for hot beverages. Once your concentrate is ready, transfer it to a mason jar for easy pouring and storage. The snug seal keeps your brew fresh, and the glass design lets you see how much you have left.

Making cold brew concentrate with a French press is simple, cost-effective, and yields a smooth, low-acid coffee base that's perfect for iced drinks. With the right ratio, steeping time, and storage, you'll have a delicious concentrate ready whenever you need a quick caffeine fix. Experiment with different roasts and dilution ratios to find your perfect cup.