My grandmother used to make this and it is very nostalgic for me.
Watergate Cake:1 (18.25 ounce) package white cake mix
1 (3.5 ounce) packages instant pistachio pudding mix
3 eggs
3/4 cup ghee
1 cup lemon-lime flavored carbonated beverage
1 cup finely chopped pecans
Directions: Combine ingredient is a bowl of an electric mixer. Beat until light and fluffy. Pour into a greased 13x9x2 pan. Bake at 350 degrees for 45 minutes. Cool and then ice
Coverup Buttercream Icing:I don't want to use the nondairy whipped topping. So Instead, here is a recipe for Pistachio buttercream frosting1/2 cup (1 stick) salted butter
1/4 cup cold milk
1 package instant pistachio pudding mix
1 cup powdered sugar
1/2 teaspoon vanilla
1/2 cup chopped pecans
Directions: Mix the milk and pudding mix together until the mix is dissolved. Add to butter and vanilla and whip in a bowl of an electric mixer. Slowly add in powdered sugar until fully blended and frosting is of a spreading consistency. (You can add more or less powdered sugar to get the right consistency) Sprinkle with pecans.