Start with your favorite coarse ground coffee, I strongly suggest organic and some filtered water. You'll want a 2:1 ratio of water to coffee. Other supplies you'll need: a cheese cloth or nut milk bag, and two glass jar/container large enough for the coffee concoction.
I usually make my cold brew with 1 cup of coffee and 2 cups of water. Measure out the coffee and add it to the water. I don't have a funnel, so I pour the coffee on to a towel and use that to funnel it into the jar with pre-measured water.
cold brew coffee concentrate
1 cup organic coffee (I recommend any of Allegro's organic blends from Whole Foods)
2 cups filtered water
2 glass jars - one for brewing and one for storage
cheese cloth or nut milk bag
Measure water and put in to a glass jar. Measure out coffee and funnel into jar with water. Shake to combine. Refrigerate for 12-24 hours.
Remove from refrigerator, strain coffee mixture through cheese cloth/nut milk bag. Store coffee concentrate in an airtight glass container for up to a week.
To serve, combine coffee concentrate with water to taste. Serve chilled or heat. Add cream, milk, or sugar if desired.