Many baking and cooking recipes like Crockpot Mac-n-Cheese require evaporated milk, because of it's reduced water content. If you find you need it, and don't have a can just follow this simple recipe. a typical can of milk is 12 oz. so make 1 full + another 1/2 of the recipe below to equal 12 oz.

Evaporated Milk
makes 1 cup. (8 oz.)
2/3 cup powdered milk
3/4 cup water.
Mix well and then ready to use.
Jan's tip: this recipe is for fat free evaporated milk. If your recipe calls for evaporated whole milk, then add 2 Tblsp. melted butter/margarine to the recipe to add in a bit of the fat that has been removed from the powdered milk.