1 box cake mix, 1 cup fat-free greek yogurt, 1 cup water. Combine thoroughly cake mix, yogurt, and water with a whisk. Spray baking pan with nonstick spray and pour in cake batter. Bake according to box instructions.
Cinnamon Crumb Cake: 2 cups flour- cup firmly packed brown sugar- cup granulated sugar- 2 tablespoons ground cinnamon- 1 cup sticks) cold butter, cut into package ounces) white cake mix egg- 1 cup sour cream- cup stick) butter, melted Pure Vanilla Extract