Easy to make extract turns the zest of 12 limes into the flavor equivalent of about 60 limes and won't leave bits of zest in your pie, pudding, punch, etc. It also has the benefit of storing much better than zest alone. Stored in a refrigerator this extract will maintain its emerald color and pure key-lime flavor longer. The zested limes can be juiced and the juice can be used immediately or frozen in an ice cube tray for later use; about 3 limes makes 1 cube of juice. One tsp of extract is enough to flavor 2 or 3 cups of liquid, or to replace 1 tsp of fresh zest in a recipe. For those worried about the alcohol content; the alcohol in this extract when used in a proportion of 1 tsp extract to 2 cups of liquid is less than that of 2 tsp vanilla extract in 3 cups liquid (a normal amount used in ice cream for instance). Cooking time includes extraction time and filtering time.