A proper cold brew coffee recipe comes down to three numbers. Use 1 cup of coarse-ground coffee to 4 cups of cold or room-temperature water for a concentrate, steep 12 to 18 hours, then dilute 1:1 with water or milk when you serve it. Want a ready-to-drink batch you can pour straight over ice? Use 1 cup of grounds to 8 cups of water and skip the dilution. Store in a sealed jar in the fridge for up to two weeks.
Cold brew coffee is smoother, less acidic coffee that you make once and drink for four mornings straight. The math is one cup of coarse-ground beans to four cups of water, twelve to eighteen hours of patience, and a careful strain through fine mesh. After that, every morning is a five-second pour over ice with whatever milk you keep in the fridge.
Gear That Helps Here
A wide-mouth jar (a 32 oz mason works perfectly) or a dedicated cold brew bottle for steeping. A burr grinder so you can dial in a coarse grind without producing fine dust that turns the brew bitter.
For straining: a fine-mesh sieve plus a paper filter, OR a reusable nut milk bag. Both work; nut milk bags are faster, paper filters give you a cleaner cup.
Recommended Reads
- Vanilla Sweet Cream Cold Brew
- Iced Caramel Latte
- Strawberry Matcha Latte
- Earl Grey Matcha
- Coffee Martini
Why Cold Brew Tastes Smoother Than Hot Coffee
The whole difference between cold brew and a hot pour-over comes down to temperature and time. Hot water pulls compounds from coffee grounds in two to four minutes, which is fast enough to extract the sugars and aromatic oils you want, but also fast enough to pull the chlorogenic and quinic acids that make hot coffee taste bright, sharp, and sometimes bitter. Those acids are what give a freshly brewed cup its zing.
Cold water moves slower. Over 12 to 18 hours, it extracts the sugars and most of the caffeine but leaves a much higher percentage of those acidic compounds locked inside the grounds. The result is a cup that reads as round, mellow, and roughly 67% less acidic than hot-brewed coffee, depending on whose lab number you trust. It tastes less like coffee on a Monday morning and more like dessert with caffeine.
The trade-off is patience. You cannot speed-brew cold brew. Twelve hours is the floor and eighteen is the sweet spot. Anything shorter and the extraction stays thin and watery; anything past 24 hours and the brew starts to taste woody and over-extracted.
A Few Notes on the Ingredients
The beans: Medium or dark roast is the move. Light roasts work, but their flavor profile is built around bright acidity that gets muted in cold extraction; you end up paying for character that never makes it into the cup. A medium-dark single-origin South American (Brazilian, Colombian) gives you chocolate and nut tones that cold brew loves. An Ethiopian single-origin pushes the cup toward berry and floral notes if you want something more interesting. Buy whole beans and grind right before brewing if you can.
The grind: Coarse. Like sea salt or French press grade. If the grounds look closer to table salt or sand, the grind is too fine, and you will end up with sludge at the bottom of your jar plus a bitter, over-extracted brew. A burr grinder is the easiest way to hit the right size consistently; blade grinders produce uneven particles that mix fine dust with bigger chunks, which gives you the worst of both worlds.
The water: Filtered is best. Tap works if your tap water tastes clean and unmineralized; if your tap has a chlorine bite or a hard-water aftertaste, that flavor carries straight into the brew over an 18-hour soak. Use cold or room-temperature water. Hot water defeats the entire point.
The ratio: 1:4 (one part coffee to four parts water by volume) gives you a concentrate you dilute 1:1 with water or milk at serving time. This is the format most home brewers use because it stores efficiently and lets you adjust the strength per cup. 1:8 gives you ready-to-drink brew that pours straight over ice, no dilution needed. Both are legitimate; the concentrate is more flexible.
Recipe: Cold Brew Coffee
Prep time: 5 minutes | Steep time: 12 to 18 hours | Total time: 12 to 18 hours | Serves: 4 (as concentrate, after 1:1 dilution)
Ingredients
- 100 g (1 cup) whole coffee beans, medium or dark roast, ground coarse
- 950 ml (4 cups) cold or room-temperature filtered water
- Cold filtered water or milk of choice, for diluting at serving (1:1 with the concentrate)
- Ice, for serving
Instructions
- Grind 100 g (1 cup) of whole beans to a coarse setting on a burr grinder. The grounds should look like sea salt, not sand. If using pre-ground coffee, ask for French press grade at the store.
- Add the coarse grounds to a 32 oz wide-mouth mason jar or a cold brew bottle. Pour in 950 ml (4 cups) of cold or room-temperature filtered water. Stir gently with a long spoon to make sure all the grounds are saturated; dry pockets float, and floating grounds do not extract.
- Seal the jar or cap the bottle. Leave on the counter at room temperature for 12 to 18 hours, or refrigerate for closer to 18 hours (the cold slows extraction, so fridge brews need more time). The sweet spot is 18 hours at room temperature or 24 hours in the fridge; under 12 hours produces a watery, under-extracted brew, and over 24 hours starts to taste woody.
- Set a fine-mesh sieve over a large bowl or pitcher and line it with a paper coffee filter or a layer of cheesecloth. (A reusable nut milk bag works equally well and strains faster.) Pour the steeped coffee through slowly, letting it drain by gravity. Do not press the grounds or wring the bag; squeezing forces sediment and bitter notes into the cup.
- Discard the spent grounds (or save them for the garden, where they make excellent compost). Transfer the strained concentrate to a clean jar, seal it, and refrigerate. The concentrate keeps for up to two weeks.
- To serve: fill a glass with ice. Pour in equal parts concentrate and cold water or milk of choice. Stir, taste, and adjust the dilution if you want it stronger or lighter. Sweeten if you sweeten; finish with a splash of cream if you finish with a splash of cream.
Notes
Storage: keep the strained concentrate in a sealed glass jar in the fridge. It holds its character for about two weeks. After day 10, the brightness starts to fade and the cup tastes flatter, though it is still drinkable. Do not freeze; the texture suffers on thaw.
Dilution math: 1:1 (equal concentrate to water or milk) gives you a standard cup with the strength of a good drip coffee. 1:2 (one part concentrate to two parts water) gives you a lighter cup, closer to a long iced coffee. Pouring the concentrate undiluted over ice gives you something closer to espresso strength, which is the move if you want an iced Americano or if the concentrate is the base of a cocktail.
If your brew tastes bitter or sludgy, the culprit is usually one of three things. The grind was too fine (most common). The steep ran past 24 hours. Or the strain was too aggressive and grounds escaped into the final pour. A second strain through a paper filter fixes the sediment problem in about a minute.
If your brew tastes thin or weak, the opposite is true. The grind was too coarse, the steep was under 12 hours, or your coffee-to-water ratio drifted higher (more water, less coffee). Weigh your beans the next round; eyeballing 1 cup of whole beans varies more than you would think.
Tips and Variations
Concentrate vs Ready-to-Drink: Which Ratio to Pick
The 1:4 concentrate is the version most home brewers settle on. It takes up less fridge space, lasts longer because of the higher caffeine density, and lets you dial the strength per cup by adjusting the dilution. One batch produces roughly eight cups of finished coffee, which is four days of mornings for one drinker or two days for a household.
The 1:8 ready-to-drink version is the move if you want zero math at serving time. You brew it, strain it, pour it over ice. It uses twice the water, takes more fridge real estate, and does not store as long, but it is faster for people who do not want to think about ratios at 7am. Some prefer the texture; ready-to-drink reads slightly more like iced coffee, while diluted concentrate can taste a little watered.
Counter Brew vs Fridge Brew
Both work. Counter brewing (room temperature, 12 hours minimum) extracts faster because warmer water is more efficient at pulling solubles. Fridge brewing (refrigerated, 18 to 24 hours) extracts slower, which gives you a more delicate cup with fewer rough edges.
If you start at 8pm and want coffee by 8am, the counter is the right call. If you start in the morning and remember the next morning, the fridge keeps the brew cleaner and stable. Some people swear the fridge version tastes more refined; others say counter brewing is the only way to get full body. Both camps are correct.
Best Beans for Cold Brew (Specific Picks)
Single-origin South American beans (Brazilian Santos, Colombian Supremo) are the safe and well-loved pick. They run heavy on chocolate, nut, and caramel notes that translate beautifully into cold extraction. Most cold brew at coffee shops uses a Brazilian or Colombian base for exactly this reason.
Ethiopian single-origins (Yirgacheffe, Sidamo) push the cup toward fruit and floral territory. They cost more and the notes are subtler in cold brew than in a pour-over, but for a more complex morning cup, they earn the upgrade. Avoid light-roast specialty beans built around acidity; the character that justifies their price tag gets washed out in cold extraction.
Sparkling Cold Brew
Fill a glass with ice. Pour in 60 ml (1/4 cup) of cold brew concentrate. Top with sparkling water or seltzer. Stir gently. This is the summer move; the bubbles strip the heaviness from the brew and the cup reads as something between iced coffee and coffee soda.
For the slightly bartender version, add 1 to 2 tsp of simple syrup or maple syrup and a few drops of vanilla extract. Garnish with an orange peel if you want to lean into the espresso-tonic energy.
Cold Brew Floats and Cocktails
An affogato-style float: a scoop of good vanilla ice cream in a small glass, 60 to 90 ml (1/4 to 1/3 cup) of cold brew concentrate poured over the top. The ice cream half-melts into the brew and you eat the rest with a spoon. The closest thing to dessert that still counts as coffee.
Cold brew also doubles as the cocktail base for an espresso martini if you do not have an espresso machine. Use the concentrate undiluted in place of the espresso shot; the result is rounder and less bracing than the classic, which some people prefer. Try it in the Coffee Martini, or layer it under the cream in a Vanilla Sweet Cream Cold Brew for the Starbucks copycat at home.
What to Serve It With
For weekday mornings: a slice of dark sourdough toast with butter, or a quick yogurt bowl with granola and berries. The mellow body of cold brew handles tangy or sweet breakfast better than hot coffee does; the cup does not compete.
For weekend brunch: pancakes, French toast, a savory egg dish like shakshuka or a frittata. Cold brew over ice is the brunch coffee that lasts the whole meal without going cold and bitter.
For dessert: serve as an affogato over a scoop of vanilla, hazelnut, or stracciatella gelato. Or pair the concentrate (undiluted, in a small glass) with dark chocolate, a slice of olive oil cake, or a square of tiramisu. The pairing leans on the chocolate notes already in the brew.
Frequently Asked Questions
What is the ratio of coffee to water for cold brew?
1:4 (one part coffee to four parts water) is the concentrate ratio you dilute 1:1 with water or milk when you serve. 1:8 is the ready-to-drink ratio that pours straight over ice. By weight, 100 g of beans takes 400 g of water for concentrate or 800 g for ready-to-drink.
How long should cold brew steep?
12 to 18 hours at room temperature, or 18 to 24 hours in the fridge. The sweet spot is 18 hours on the counter; you get balanced extraction without the brew tipping into woody, over-extracted territory. Set the jar in the evening and strain it the next afternoon.
Is cold brew stronger than regular coffee?
The concentrate is, yes. Undiluted cold brew at the 1:4 ratio runs roughly twice the caffeine of standard drip coffee per ounce. After you dilute it 1:1, it lands close to drip-coffee strength, maybe a touch stronger. The flavor is mellower because of the cold extraction, which makes the caffeine easier to underestimate.
What is the difference between cold brew and iced coffee?
Iced coffee is hot-brewed coffee poured over ice. It cools fast but keeps the acidity and bitterness of a hot extraction. Cold brew never touches heat, so the cup is rounder, sweeter, and less acidic. They are different drinks made from the same beans.
How long does cold brew last in the fridge?
Up to two weeks in a sealed glass jar. Ready-to-drink (1:8) starts to lose brightness after a week. Concentrate (1:4) holds longer because the higher caffeine density slows oxidation. Either way, after day 10 the cup tastes flatter.
Key Takeaways
- 1:4 by volume for concentrate, 1:8 for ready-to-drink. Dilute concentrate 1:1 at serving.
- Steep 12 to 18 hours at room temperature or 18 to 24 hours in the fridge. 18 hours is the sweet spot.
- Grind coarse, like sea salt. Fine grinds make the brew bitter and sludgy.
- Use medium or dark roast beans. Single-origin South American is the easy default; Ethiopian is the upgrade.
- Strain through a paper filter or nut milk bag. Do not press or squeeze the grounds.
- Store in a sealed jar in the fridge for up to two weeks.
Final Thoughts
Cold brew is the morning coffee that respects your morning. You do the work once, on a Sunday night while you put the kitchen to bed, and then four mornings in a row you open the fridge, fill a glass with ice, and pour. No grinder noise at 7am, no scrambling for filters, no half-burned French press at the bottom of a busy week.
The concentrate format is what makes the recipe useful. With a jar of it in the fridge, you have the base for plain iced coffee, a Vanilla Sweet Cream Cold Brew when you want the Starbucks copycat, an affogato when guests come over, or a cocktail base for the Coffee Martini on a Friday night.
Get the ratio right once and you will not think about it again. 1:4, 18 hours, coarse grind, slow strain. That is the whole recipe.
Cold Brew Coffee
A proper cold brew coffee recipe comes down to three numbers. Use 1 cup of coarse-ground coffee to 4 cups of cold or room-temperature water for a concentrate, steep 12 to 18 hours, then dilute 1:1 with water or milk when you serve it.
Ingredients
- 100 g (1 cup) whole coffee beans, medium or dark roast, ground coarse
- 950 ml (4 cups) cold or room-temperature filtered water
- Cold filtered water or milk of choice, for diluting at serving (1:1 with the concentrate)
- Ice, for serving
Instructions
- Grind 100 g (1 cup) of whole beans to a coarse setting on a burr grinder. The grounds should look like sea salt, not sand. If using pre-ground coffee, ask for French press grade at the store.
- Add the coarse grounds to a 32 oz wide-mouth mason jar or a cold brew bottle. Pour in 950 ml (4 cups) of cold or room-temperature filtered water.
- Seal the jar or cap the bottle. Leave on the counter at room temperature for 12 to 18 hours, or refrigerate for closer to 18 hours (the cold slows extraction, so fridge brews need more time).
- Set a fine-mesh sieve over a large bowl or pitcher and line it with a paper coffee filter or a layer of cheesecloth. (A reusable nut milk bag works equally well and strains faster.) Pour the steeped coffee through slowly, letting it drain by gravity.
- Discard the spent grounds (or save them for the garden, where they make excellent compost). Transfer the strained concentrate to a clean jar, seal it, and refrigerate. The concentrate keeps for up to two weeks.
- To serve: fill a glass with ice. Pour in equal parts concentrate and cold water or milk of choice. Stir, taste, and adjust the dilution if you want it stronger or lighter.
Notes
Storage: keep the strained concentrate in a sealed glass jar in the fridge. It holds its character for about two weeks. After day 10, the brightness starts to fade and the cup tastes flatter, though it is still drinkable. Do not freeze; the texture suffers on thaw.
Dilution math: 1:1 (equal concentrate to water or milk) gives you a standard cup with the strength of a good drip coffee. 1:2 (one part concentrate to two parts water) gives you a lighter cup, closer to a long iced coffee. Pouring the concentrate undiluted over ice gives you something closer to espresso strength, which is the move if you want an iced Americano or if the concentrate is the base of a cocktail.
Last update on 2026-10-03 / Affiliate links / Images from Amazon Product Advertising API