1. Gather your goods. Amish Cook’s Family Favorite Recipes  Good news: No fancy equipment needed here. All you need is a cup of coarsely ground coffee (go for a dark roast, since concentrate is all about maximum flavor) and a large mason jar. (Learn what else you can do with a mason jar in theand bring more than 300 original dishes from Amish country straight to your kitchen.)
  2. Put your coffee in the jar, add water, and stir. For every 1 cup of ground coffee, you’ll need 4 cups of cold water. Straight from the tap is fine, unless you aren’t a fan of the taste (in that case, use bottled or filtered water instead). Use a wooden spoon to stir the mixture well. If it looks sort of like toxic sludge, you’re right on target. MORE: 10 Slimming Smoothie Recipes
  3. Let it steep. Screw the lid and let your mixture steep on the counter overnight, or up to 12 hours. The longer it sits, the stronger and more flavorful your concentrate will be.
  4. Strain your mixture. Pour the concentrate through a sieve lined with cheesecloth or a paper towel. (It may take a minute or two to strain completely.) Discard the steeped grounds or toss them in your compost pile. Transfer your concentrate back to the mason jar and screw on the lid. It’ll keep in the refrigerator for up to 2 weeks. MORE: 25 Flat Belly Water Recipes
  5. Savor your efforts. For the perfect cold cuppa, fill a glass with ice. Add one part concentrate to one part cold water and mix well. Now drink up!