Vicki's Mom's Pistachio Cake

I stole this recipe from Vicki's blog. Very much worth stealing.

Ingredients for Cake:

1 package yellow cake mix
1 package instant pistachio pudding
3 eggs
1 cup club soda
1 cup oil

Ingredients for Frosting:

1 1/2 cups cold milk
1 package instant pistachio pudding
1 envelope dream whip

Directions:

Preheat oven to 350°. Mix all cake ingredients together, mixing on medium speed for 2 minutes. Pour into greased and floured bundt pan (I made them in regular sheet cake form and cupcake form). Bake for 50 minutes (see cake package for baking times on cake or cupcakes). Cool in pan for 15 minutes. Turn onto rack and cool completely. Blend all frosting ingredients with an electric mixer and beat until thickened, about 5 minutes. Cut the cake into 2 layers, frost in between layers, then reassemble the cake and frost the outside. Keep cake refrigerated