This recipe is for approximately 1 ice cube tray, making 14 ice cubes that are each 1 oz (30 fl. ml.)
1 oz x 14 = 14 oz = 420 ml
At a 1:10 ratio of coffee grounds to water, we'll need 42 grams of coffee. Your ice cube tray may have more or fewer ice cubes that are different volumes.
Prepare your coffee as you normally would - here we use 42 grams of coffee with 420 ml of filtered water to produce 420 ml of coffee
Once brewed, carefully pour the coffee into the ice cube trays
Place in freeze for approximately 2 hours
You can make more coffee than is required here, and simply drink the leftovers :)