7 Steps to Make Cold Brew Coffee at Home

Last Updated: November 4, 2026

Table of Contents

• What You Need to Make Cold Brew Coffee at Home
• The Best Grind Size for Cold Brew
• The Cold Brew Coffee Ratio That Works
• How to Make Cold Brew Without a Coffee Maker
• Steeping Time and Temperature: Room vs. Refrigerator
• How to Strain and Filter Your Cold Brew
• How to Store Cold Brew Coffee for Maximum Freshness
• Find Your Perfect Roast for Cold Brew
• Frequently Asked Questions

What You Need to Make Cold Brew Coffee at Home

Learning how to make cold brew coffee at home starts with a short equipment list and a little patience. Cold brew coffee is a brewing method that steeps coarse ground coffee in cold or room-temperature water for an extended period, typically 12 to 24 hours, producing a smooth, low-acid concentrate. Cold brew is one of the best ways to taste the freshness of a well-roasted coffee because the method hides nothing.

Here is the no-fuss equipment list:

• A glass jar or large pitcher with a lid
• Coarse ground coffee, about the texture of sea salt
• Filtered water
• A scale for measuring by weight
• A spoon for stirring
• A fine mesh strainer, cheesecloth, or reusable filter
• A second jar or container for storage

You do not need a coffee maker, a French press, or any specialty brewer. A jar and a strainer will do the job.

The Best Grind Size for Cold Brew

Coarse grind is the best grind size for cold brew. Aim for a texture like coarse sea salt, where you can still see distinct particles. A medium grind works in a pinch, but it produces more sediment and a muddier cup.

Why does grind size matter so much here? Cold water extracts slowly, so surface area controls the pace. Too fine, and you get bitterness and a filter clogged with sludge. Too coarse, and the brew tastes thin and watery because the water never reaches the center of the grounds.

If you grind at home, pulse in short bursts rather than running the grinder continuously. A common mistake is grinding fine out of habit, the way you would for a drip machine. Cold brew rewards the opposite approach.

If you only change one variable, change the grind. The right coarse grind fixes more cold brew problems than any other adjustment.

Readers who want to know whether their grinder can actually hit a consistent coarse grind can read our comparison of burr grinders versus blade grinders.

The Cold Brew Coffee Ratio That Works

The cold brew coffee ratio we recommend is 1 part coffee to 8 parts water by weight, which produces a concentrate you dilute before serving. For a standard batch, that means 100 grams of coarse ground coffee to 800 milliliters of filtered water.

Use this table to scale up or down:

Measure by weight, not by scoop. Volume measurements vary with grind and bean density, and a scale removes the guesswork.

For a stronger, more syrupy concentrate, tighten the ratio toward 1:5. For a ready-to-drink batch, loosen it toward 1:12. Dilution comes later: pour the concentrate over ice and add water or milk to taste.

If you want to change strength after brewing without re-grinding your beans, our guide on adjusting coffee strength without changing grind size walks through the options.

How to Make Cold Brew Without a Coffee Maker

Making cold brew without a coffee maker takes four steps and no electricity. Here is the process:

1. Combine. Add your coarse ground coffee to a jar, then pour filtered water over the grounds. Stir gently to saturate every particle and break up dry clumps.
2. Steep. Cover the jar and let it sit. Room temperature for 12 to 16 hours, or the refrigerator for 16 to 24 hours.
3. Strain. Pour the mixture through a fine mesh strainer lined with cheesecloth or a reusable filter into a second container.
4. Store. Seal the finished brew and refrigerate.

A few practical notes. Stir once at the start, not repeatedly during steeping, since agitation can push fine particles through your filter later. Leave headspace in the jar, because the grounds swell as they absorb water. And do not press or squeeze the grounds when straining, since that releases bitterness.

That is the whole method. The equipment is a jar, a spoon, and something to filter through, which is why this works in a small kitchen or a hotel room just as well as at home.

Steeping Time and Temperature: Room vs. Refrigerator

Steeping time and temperature are the two variables that decide the character of your brew, and they interact. Most recipes treat them as a single choice, room temperature for X hours or the refrigerator for Y hours, but the useful question is what each one actually does to the coffee, so you can dial in a batch instead of guessing.

The mechanism is straightforward. Extraction is a function of time, temperature, and surface area. Warm water moves faster, so it pulls soluble compounds out of the grounds more quickly and reaches deeper into the bean.

Here is how the two methods compare across the variables that matter:

A controlled comparison makes the trade-off concrete. Take the same coffee, the same coarse grind, and the same 1:8 ratio, and split it into two jars.

The practical rule is to change one variable at a time. If you start with the refrigerator method at 18 hours and the result tastes weak, extend the next batch to 22 hours before you touch the ratio or the grind.

Cold Brew Coffee →

Watch out: past roughly 24 hours at room temperature, extraction tips from pleasant to bitter and woody, and no amount of dilution fixes it. Refrigerator batches are more forgiving but still degrade past about 24 hours. Set a timer rather than guessing.

A reasonable starting point is the refrigerator method at 18 hours. It is forgiving, and if the result tastes weak, you can extend the next batch rather than risk over-extraction.

How to Strain and Filter Your Cold Brew

Straining is where most homemade batches go wrong, and the fix is a two-stage filter. First, pour the steeped mixture through a fine mesh strainer to catch the bulk of the grounds. Second, pass the liquid through cheesecloth or a reusable cloth or metal filter to remove the fine sediment.

Sediment is not dangerous, but it makes the cup gritty and turns the brew cloudy. If you skip the second pass, expect a muddy texture and a shorter shelf life.

Filter-method comparison, briefly:

• Fine mesh strainer alone: fastest, but lets fine particles through
• Cheesecloth: good clarity, needs rinsing and wringing
• Reusable cloth or metal filter: best clarity and reusable, but slower
• Paper filter: cleanest cup, but strips some body and oils

Rinse your cloth filter before use to remove any lint or storage taste. Work in small batches when pouring so the filter does not clog and overflow.

How to Store Cold Brew Coffee for Maximum Freshness

Storage is where homemade cold brew quietly goes wrong. The brew itself is fine; the handling around it is what shortens its life.

Start with clean equipment. Wash the steeping jar, the storage container, and any reusable filter in hot soapy water and rinse thoroughly before each batch.

Use the right container. A glass jar or pitcher with a tight-fitting lid is the simplest choice, and filling it nearly full limits the headspace where oxygen sits.

Know your freshness windows. These are realistic ranges, not guarantees, and they assume the brew was strained clean and kept cold the whole time:

The single biggest shelf-life mistake is adding milk or sweetener to the whole batch.

Temperature discipline matters as much as the container.

Label the container with the brew date. A strip of masking tape and a marker removes all guessing about whether a jar is three days old or ten.

Watch out: if the brew starts smelling sour, develops a film on the surface, or turns visibly cloudy when it was previously clear, discard it.

For broader guidance on keeping beans and brewed coffee at their best, our coffee storage guide covers containers, light exposure, and freezer tips.

Find Your Perfect Roast for Cold Brew

Roast choice shapes the final cup as much as grind and time. Medium and medium-dark roasts tend to shine in cold brew because they carry chocolate, caramel, and nutty notes that hold up through long steeping. Very light roasts can taste sharp and underdeveloped when brewed cold, while very dark roasts can turn ashy if you steep them too long.

The Cold Brew Coffee blend is a medium roast with smooth chocolate, toffee, and floral tones, and it is suited to cold brew or nitro. If you prefer a single origin, our Guatemala brings dark chocolate, bright fruit, and butterscotch, and our Brazil Santos offers an elegant, smooth cup with cocoa notes. Coffees are roasted to order for maximum flavor and aroma.

When you are ready to choose a bag, our guide to the best coffee beans for home brewing breaks down roast levels and origins, or you can go straight to the Cold Brew Coffee and start steeping this week.

Cold brew rewards small, deliberate choices: a coarse grind, a measured ratio, and a steep time you actually track. If you want beans roasted for this method rather than adapted to it, theITDGroup LLC roasts to order with carefully sourced beans, a fresh roast guarantee, and reliable delivery to your door. Find your perfect roast and taste the difference freshness makes in your next batch.

Add theitdgroupcoffee.com as a preferred source on Google →