Chocolate Cake

1 pkg chocolate cake mix (Duncan Hines)
1 small pkg chocolate pudding mix
1 cup sour cream
4 eggs
1/2 cup warm water
1/2 cup vegetable oil
3 TBSP melted butter

Mix together and bake at 350 for the amount of time on the box.

Frosting:
1/2 cup butter
1/8 tsp salt
4 1/2 cups powdered sugar
add 1/2 cup cocoa
2 eggs
1 tsp vanilla
1/4 cup water