2.5 cups ice cold water
1.5 cups coffee grounds
I used a mason jar. I added 1 cup cold water to the coffee grounds. Stir it gently. Slowly add remaining 1.5 cups cold water, stirring the grounds as little as possible. I covered the jar and turned it over. Let steep at room temperature for 12 hours. Strain the coffee grounds through a coffee filter. I did a little bit at a time. Store the concentrate in refrigerator for up to two weeks. I mix one part coffee concentrate with 1 part almond milk and 2 parts water. I add ice and creamer, along with a little bit of sugar and put it in the blender. Delicious Frozen Coffee!