Jun 30, These easy ingredient substitutions for milk will help you out when the fridge is bare Use 1 cup of water and /2 teaspoons of butter for every 1 cup of You can also use kefir, a drinkable yogurt, as a substitute for milk. Apr 9, Plain yogurt or sour cream works brilliantly as a substitute for the milk in mac and cheese recipes and results in a creamier, tangier dish. Jul 3, You'll never even miss the milk in this mac and cheese recipe. with this fantastic substitute– that I've started using even when I do have milk. What Is A Substitute For Butter In Mac And Cheese?