You can use a white cake mix to bake a yellow cake by making a few simple changes to the ingredients. White cake mix requires egg whites rather than whole eggs because the color of the egg yolks will turn the cake yellow. Adding the egg yolks and increasing the amount of vegetable oil is all it takes to change a white cake to yellow. So if you only have a box of white cake mix on hand, you can still enjoy a delicious yellow cake.
Pour the contents of the box of cake mix into a large mixing bowl.
Add 1 1/3 cups of water, 1/3 cup of vegetable oil and 3 eggs to the mixing bowl.
Stir everything together with a wooden spoon until the cake batter has a uniform color and consistency.
Pour the bake batter into a greased 13-inch-by-9-inch baking pan or two 8-inch baking pans.
Bake the yellow cake in a preheated 350 degree oven for 30 to 35 minutes. The cake is done when a knife inserted near the center comes out clean.