Place the coffee grounds in a quart-size mason jar. Fill the jar with cold water and stir. Cover and let sit at room temperature for 12 hours.
1 cup coffee grounds, 3 ½ cups cold water
Strain the mixture and discard the grounds. Serve the cold brewed coffee, diluted to taste with hot or cold water or over ice, if desired.
Store the cold brew in the fridge for a week or two.
Notes
Note: If you want to make more or less, keep in mind the ratio of 1 part ground coffee to 3.5 to 4 parts water.This concentrate can be used as a substitute for espresso in recipes.To serve: dilute to taste with cold or hot water, starting with 1 part concentrate and 2 parts water. Add milk, almond milk, cream, or sugar according to your preferences.