Cold Brew in a JarEasy Ready-to-Drink Recipe
Cold brew at drinking strength, made in a jar: 80 g coffee, 1,150 g water, 8 hours in the fridge. Strain it and pour it straight over ice.
- Prep
- 10 min
- Steep
- 8 hin the fridge
- Ratio
- 1:14.4coffee to water
- Makes
- 990 mL3 glasses
What goes in the jar
- 80 g2.8 ozCoffee, ground medium-fineHario's recipe calls for dark roast
- 1150 g40.6 ozCold waterabout 1,150 mL
ounces are rounded. weigh it and the ratio holds
10 minutes of work, then 8 hours in the fridge
Weigh 80 g of coffee and grind it medium-fine.
Put the coffee in a lidded jar or pitcher that holds at least 1.3 L, and pour in 1,150 g of cold water. Stir until every ground is wet.
Cover and refrigerate for about 8 hours.
Strain through a fine mesh strainer, then through a paper filter or clean cloth. Let it drain on its own.
Pour it into a clean bottle or jar, seal it and refrigerate. Expect about 1 L, ready to serve over ice.
This batch brews at drinking strength, so there’s nothing to dilute. You give up the concentrate’s flexibility for fewer steps, and it takes more fridge space per glass.
Where the numbers come from
- Ratio, 1:14.4 by weight. The calculator’s default ready-to-drink ratio, taken from Hario’s published recipe for its Mizudashi pot: 80 g of coffee to about 1,150 mL of water for 1,000 mL brewed. Hario wrote it for the pot’s mesh strainer. A jar and a separate strainer use the same ratio with a different filter.
- Steep, 8 hours in the fridge. Hario’s figure for the same pot. A fridge brew runs slower than one at room temperature, and the studies we cite didn’t measure by how much. The steep time Lab file explains the gap.
- Yield, about 990 mL. 1,150 − 2 × 80 = 990 mL at the calculator’s 2 g/g retention estimate. Hario says 1,000 mL.
For a bigger batch, use the calculator link below. It keeps the ratio and changes the weights.
need a bigger jar? Scale it in the calculator
The kit for this jar
- the makerHario Mizudashi Cold Brew Coffee Pot, 1000 mL (opens in a new tab)1,000 mL · immersion
- the grinderBaratza Encore (opens in a new tab)plastic
- the scaleEtekcity EK4150 Digital Kitchen Scale (opens in a new tab)
