Use plain Greek yogurt in place of oil or butter in your cupcake mix. You'll get a tender and moist cake that will have everyone asking for your secret ingredient.

Greek Yogurt Confetti Cupcakes

Preheat oven to 350 degrees. Line a standard muffin tin with cupcake papers. 

In a medium bowl, mix together cake mix, water, egg whites, and 1/4 cup plain Greek yogurt. Divide mixture between cupcake tins. Bake 15 to 20 minutes or until toothpick inserted near center comes out clean. Cool cupcakes on a wire cooling rack.

Stir together whipped topping and 1 cup vanilla Greek yogurt in another medium bowl. Spread yogurt mixture on top of completely cooled cupcakes. Garnish with sprinkles, if desired. Store in a covered container in the refrigerator.