Cold Brew Recipe: How to Make Cold Brew Coffee at Home

Cold brew is one of the smoothest, most forgiving coffees you can make at home. No heat means no bitterness — just clean, naturally sweet coffee that keeps in your fridge for two weeks and takes about 5 minutes of actual effort. The rest is waiting.

This guide covers the complete cold brew process: ratios, grind size, brew time, two easy methods (mason jar and French press), filtering, storage, and how to serve it.

What Makes Cold Brew Different

Cold brew is made by steeping coarse-ground coffee in cold water for an extended time — typically 12–24 hours. The complete absence of heat changes the chemistry of extraction:

• Lower acidity: Heat extracts acidic compounds quickly. Cold, slow extraction produces a noticeably less acidic cup — important for anyone sensitive to coffee’s acidity.
• Naturally sweeter: Without the bitter compounds that heat extraction releases, cold brew often tastes slightly sweeter than hot coffee without any added sugar.
• Smoother mouthfeel: The flavor profile is rounder and less sharp — more chocolate and caramel, less of the bright, acidic notes in hot-brewed coffee.
• Longer shelf life: Unlike brewed hot coffee (which goes stale within hours), cold brew concentrate keeps for up to two weeks refrigerated.

Cold brew vs. iced coffee is a common point of confusion: iced coffee is hot-brewed coffee poured over ice, which dilutes as the ice melts and retains the acidity of hot extraction. Cold brew is never heated at any point in the process.

What You Need

Coffee: Almost any coffee works. Medium to dark roasts work particularly well for cold brew’s chocolate-and-caramel profile. Single-origin light roasts can produce fruity, interesting cold brews — experiment once you have the basics down.

Grind: Coarse — similar to coarse sea salt or French press grind. This is critical. Fine grinds over-extract and are hard to filter.

Water: Use filtered water if your tap water tastes strongly of chlorine. Cold brew steeps for a long time, so water quality affects the flavor more than in quick-brewed coffee.

Equipment: You need a container for steeping and something to filter the grounds. A mason jar (or any large jar with a lid), plus a fine mesh strainer and either cheesecloth, a paper coffee filter, or a nut milk bag for filtering. A French press makes the process even easier (built-in filter).

Ratio: See the section below — the most important variable.

Cold Brew Ratio: Concentrate vs. Ready-to-Drink

Cold brew is most commonly made as a concentrate — a very strong brew intended to be diluted 1:1 before drinking. Making concentrate is efficient: you get more servings per batch and it stores longer.

Concentrate ratio: 1:4 coffee to water (by weight)

• Example: 100g coffee + 400ml water = enough concentrate for 4–6 drinks (after diluting)

Ready-to-drink ratio: 1:8 coffee to water (by weight)

• Example: 50g coffee + 400ml water = 2–3 servings, drink straight

Tip: Concentrate is more versatile — you can dilute it with water for regular cold brew, dilute with milk for a cold brew latte, or use it straight in cocktails (cold brew martini) without it tasting watered down.

If measuring by volume rather than weight:

• Concentrate: approximately 1 cup ground coffee per 4 cups water
• Ready-to-drink: approximately 1 cup ground coffee per 8 cups water

Method 1: Mason Jar (Simplest)

This is the most common home method — no special equipment beyond a jar and a strainer.

What you need:

• Large mason jar or pitcher (32 oz / 1 liter for a standard batch)
• Coarse-ground coffee
• Cold or room temperature filtered water
• Fine mesh strainer
• Cheesecloth, paper coffee filter, or nut milk bag (for filtering)

Ingredients (concentrate):

• 100g coarse-ground coffee (about ⅔ cup)
• 400ml cold filtered water (1¾ cups)

Steps:

1. Add coffee grounds to the mason jar.
2. Pour water over the grounds slowly. Stir gently to make sure all grounds are saturated (dry grounds sitting on top won’t extract).
3. Cover the jar — with the lid or a piece of plastic wrap.
4. Steep in the refrigerator for 18–20 hours. (Room temperature: 12–14 hours.)
5. Filter: Set a fine mesh strainer over a bowl or second jar. Line it with cheesecloth or a paper filter. Pour the cold brew through slowly — don’t rush or squeeze, which forces fine particles through.
6. Store the filtered concentrate in a sealed jar in the fridge.

Serving: Pour concentrate over ice with equal parts water, or equal parts milk for a cold brew latte. Add simple syrup or flavored syrups to taste.

Method 2: French Press (Easy Filtering)

If you have a French press, it simplifies the filtering step — the built-in plunger strains out the grounds.

Ingredients (concentrate):

• 100g coarse-ground coffee
• 400ml cold water

Steps:

1. Add grounds to the French press carafe.
2. Pour cold water over the grounds. Stir gently to saturate all grounds.
3. Place the lid on (do NOT press the plunger yet) and refrigerate.
4. After 18–20 hours, slowly press the plunger down.
5. Pour the cold brew into a separate container immediately — don’t leave it in the French press, or it will continue extracting and over-steep.
6. Store in the refrigerator.

Note: The French press filter is not as fine as cheesecloth. Your cold brew may have some fine particles (sediment) at the bottom — this is normal and not harmful, just a slightly different mouthfeel. For very clean cold brew, pour through a paper filter after pressing.

Brew Time Guide

Signs of under-extraction: Weak flavor, sour or acidic notes, thin body. Fix: brew longer, or use a finer grind next time.

Signs of over-extraction: Harsh, dry, or astringent finish — like a bitter tea. Fix: reduce brew time or use a coarser grind.

Filtering Your Cold Brew

Good filtering is what separates smooth, clean cold brew from gritty, muddy cold brew.

Single mesh strainer only: Quick but leaves fine particles. Acceptable but not ideal.

Mesh strainer + cheesecloth: Good combination — the cheesecloth catches the fine particles the mesh strainer misses. Rinse cheesecloth before using to remove any fibers.

Paper coffee filter (drip filter): Produces the cleanest, clearest cold brew. Slow — allow 20–30 minutes for the cold brew to drip through. Worth it for clarity.

Nut milk bag: Reusable, easy to clean, produces clean results. Good middle ground between cheesecloth and paper filter.

Tip: Pour in small batches and don’t press or squeeze. Patience produces cleaner cold brew.

Cold Brew Serving Ideas

Classic Cold Brew

Pour 4–6 oz concentrate over a glass full of ice. Add 4–6 oz cold water (1:1 dilution). Stir. Optionally sweeten with simple syrup.

Cold Brew Latte

Dilute concentrate 1:1 with cold milk (whole milk, oat milk, almond milk — all work). Pour over ice. Add vanilla syrup or caramel syrup if desired.

Vanilla Sweet Cream Cold Brew

Dilute concentrate with water as usual. Top with homemade vanilla sweet cream — heavy cream, milk, and vanilla syrup mixed together and poured over. See our full vanilla sweet cream cold brew recipe for the exact ratios, Starbucks copycat tips, and variations.

Cold Brew Tonic

A surprisingly good combination: 3 oz cold brew concentrate + 4–5 oz tonic water over ice. The bitterness of the tonic and the coffee complement each other. Garnish with a lemon slice.

Cold Brew Protein Shake

Blend: 4 oz cold brew concentrate, 1 cup milk, 1 scoop chocolate protein powder, 1 banana, ice. A legitimate pre-workout drink.

Iced Brown Sugar Cold Brew

Dilute cold brew concentrate 1:1 with water. Add 1–2 tbsp brown sugar syrup. Pour over ice, stir. Add a splash of whole milk or cream. Sprinkle cinnamon on top.

Flavored Cold Brew Variations

Cold brew is an excellent base for flavored drinks because its smooth, low-acid profile plays well with sweeteners and spices.

Vanilla Cold Brew: Add 1–2 tsp vanilla extract or vanilla syrup to the steeping batch. Subtle vanilla note throughout.

Cinnamon Cold Brew: Add a cinnamon stick (or ½ tsp ground cinnamon in a tea bag) to the grounds before steeping. Remove when filtering.

Chocolate Cold Brew: Add 1–2 tbsp Dutch-process cocoa powder to the grounds before steeping. Filter carefully. The result has a natural mocha character.

Spiced Cold Brew: Add a cinnamon stick + 2–3 cardamom pods + a small piece of vanilla bean to the grounds before steeping. A chai-inspired cold brew.

Storage and Shelf Life

Always store cold brew sealed and refrigerated. Cold brew is safe to drink for up to two weeks as concentrate — after that the flavor degrades noticeably, becoming flat and dull.

Batch brewing tip: Make a large batch of concentrate on Sunday and it’ll last you through the week, giving you a fresh iced drink every morning with 30 seconds of effort (just pour and dilute).

Cold Brew Troubleshooting

Cold brew tastes weak/watery:

• Ratio is off — use more coffee per amount of water
• Grind is too coarse — go slightly finer
• Under-brewed — extend steeping time to 20–24 hours

Cold brew tastes bitter/harsh:

• Over-extracted — reduce steeping time or use coarser grind
• Left in the grounds too long after initial brew — filter completely and transfer to separate container
• Grind too fine — switch to a coarser setting

Cold brew is cloudy/gritty:

• Filter a second time through a paper coffee filter
• Use a coarser grind next time
• French press sediment is normal; paper filter removes it

Cold brew tastes flat/sour:

• Water quality — try filtered water
• Under-extracted — brew longer
• Stale coffee — use fresher beans

Cold Brew FAQ

Can I make cold brew without a grinder?

Yes — buy pre-ground coffee at a coarse setting (labeled “French press” or “coarse grind”). Many specialty coffee shops will grind beans coarse for you if you bring them in. Avoid pre-ground supermarket coffee (which is usually medium-fine) — the grind is too fine for ideal cold brew.

Can I heat cold brew to drink it hot?

Yes — cold brew concentrate heated gently with hot water produces a very smooth hot coffee with none of the usual hot-extraction bitterness. Use 1 part concentrate to 1 part hot water. It won’t taste like drip coffee — it’s much smoother and rounder.

Does cold brew work with decaf?

Yes, decaf works well for cold brew. The slow cold extraction is gentle enough that decaf still produces a flavorful result. Use the same ratio and brew time as regular coffee.

Once you’ve dialed in your ratio and steep time, cold brew becomes one of the easiest coffee routines you can build. Make a batch, filter it, and you have two weeks of smooth, delicious iced drinks ready whenever you want them.

For the cold foam to go on top, see our how to make cold foam guide. For understanding how cold brew compares to espresso in terms of process and flavor, check out our cold brew vs espresso comparison.