Here is one,
Prepare cake mix as per package directions. In addition to this add,
1 egg
1 cup flour
250 ml (or 8 oz.) sour cream or yogurt (I prefer to use low fat yogurt)
1 cup white sugar
1/3 tsp. salt
1 tsp. vanilla or other suited flavouring
Here is another for chocolate,
1 box chocolate cake mix, brand of your choice
Use the same water, oil, and eggs as called for on the box and also add:
1 cup flour
1/2 cup sugar
1 teaspoon vanilla
1 teaspoon baking powder
1 egg
1/2 package chocolate instant pudding
You could always do a half recipe of WASC
2 boxes white cake mix
2 cups all-purpose flour
2 cups granulated sugar
1 1/2 teas. salt
8 egg whites
2 2/3 cups water
4 Tbls. vegetable oil
2 cups (16oz carton) sour cream
2 teaspoon clear vanilla flavor
2 teaspoons almond extract

Mix all dry ingredients by hand using a whisk in a very large mixing bowl. Add the rest of the ingredients and beat on low speed for 2 minutes. Bake at 325 degrees
***One recipe makes: one 14" round + one 6" round
or one 16" round
or one 12" round + one 10" round
or one 12x18" sheet cake
or one 12" round + one 8" round + one 6"
Half a recipe makes: two 8" rounds
or two 6" rounds + 6 cupcakes
Whew! Hope one of these works!