Credit: Jeffrey Morgenthaler
Ingredients
8 oz coffee, coarse grind
32 oz cold water
Directions
Add 16 oz cold water to the coffee grounds in a large container, stir to moisten the grounds, and let sit for 30 minutes. Add the remaining 16 oz water, stir again, cover, and let sit for 24 hours. Strain through a fine mesh sieve, then run the resulting liquid through a coffee filter.
Notes
Running it through the coffee filter is key. I ended up with between 20-24 oz concentrate.
