Instructions:

Cake Mix Cake Extender

Use this extender for higher and lighter cakes

1 (18.25 ounce) box cake mix (any flavor)
1 cup all-purpose flour
3/4 cup granulated sugar
1 teaspoon baking powder
1/2 cup vegetable oil
2/3 cup water

Prepare cake mix per package directions. Combine remaining ingredients and add to batter. Pour into greased 9 x 13-inch pan and bake per package directions, adding 15 extra minutes to baking time.