Frosting:

1/4 c. (1/2 stick) butter, melted
1 lb. (1 box) sugar
8 oz. cream cheese, softened
1/2 c. pecans, chopped
1 tsp. vanilla

Mix together all ingredients. Put frosting on cake.

Cake Mix:

1 c. sour cream
1 tbsp. cocoa
1/2 c. sugar

Mix together all ingredients. Pour into a greased and floured 9x13-inch pan.

Bake at 350°F for 30 minutes.