Watergate Cake - cooking recipe

Ingredients

1 box white cake mix (plain)
1 box instant pistachio pudding (3 3/8 oz.)
1 c. oil
1 c. Seven-Up
4 eggs

Preparation

Mix first 4 ingredients.
Add eggs, one at a time, beating on medium speed for 4 minutes.
Pour into a greased and floured 13 x 9 x 2-inch sheet cake pan.
Bake at 350\u00b0 for 30 minutes.
The edges will pull away from the pan and the center will be firm to the touch when the cake is done.
Allow the cake to cool enough to be removed from the pan.
Place on the serving tray.
Let cake cool and refrigerate.