Since evaporated milk is a thicker, sweeter-tasting milk, it isn't typically substituted for fresh milk for drinking purposes. It can, however, play a role in cooking as a substitute for fresh milk. In most dishes, the Very Best Baking website notes, you won't even notice the taste difference. And for health's sake, you can use lowfat and fat-free options. How you use the evaporated milk depends on the result you are aiming for. If you want a creamier end product, use more evaporated milk; if you want it to taste as it would if you used fresh milk, use less evaporated milk.
Creamier, Thicker Taste Than Fresh Milk
Prepare the ingredients for your recipe according to instructions.
Measure an amount of evaporated milk equal to the amount of fresh milk called for in the recipe.
Add the evaporated milk to the ingredients and prepare as directed.
Taste the Same as Fresh Milk
Prepare the ingredients for your recipe.
Measure half the amount of evaporated milk as the amount of fresh milk called for in the recipe. Add water to the measuring cup to make up the other half so you are substituting half evaporated milk and half water for the full volume of fresh milk.
Add the evaporated milk and water to the other ingredients and prepare as directed.