Everybody loves cupcakes, and these have a wonderfully tasty hidden treasure inside. They're rich and delicious! —Marlene Schollenberger, Bloomington, Indiana

buttermilk

To substitute for each cup of buttermilk, use 1 Tbsp. white vinegar or lemon juice plus enough milk to measure 1 cup. Stir, then let stand 5 min. Or, use 1 cup plain yogurt or 1-3/4 teaspoon cream of tartar plus 1 cup milk.