I've made the white and chocolate many times but have not tried the yellow.

i have done it many times. just replace the cake mix with the yellow. that's it. just did it this weekend to make a marble cake. tasted wonderful.

When I do yellow cake, I use the same recipe for WASC, only using 2 yellow cake mixes instead of the white and using 6 whole eggs instead of 8 egg whites. It comes out really moist and yummy. Good luck!

So if I'm using 1 box mix, I would use 3 whole eggs and the amount of oil that it calls for on the box? Thanks for your help.

If I'm halving the recipe, then yes, I just use 3 eggs and 1/8 cup of oil.

I don't use oil in my WASC recipe. The recipe I have doesn't call for oil at all. Just the 3 eggs and sour cream.