2 sticks butter
2 c. sugar
4 tbsp. cocoa
4 eggs
7 oz. jar marshmallow cream
1 1/2 c. flour
2 tsp. vanilla
1 c. chopped nuts

ICING:

1/2 stick butter with 1/4 c. cocoa (melted together)
1/4 c. milk
1 tsp. vanilla
1/2 box powdered sugar

Melt butter; add cocoa. Add remaining ingredients (except marshmallows). Pour in large pan (11x15) and bake at 350 degrees for 35-45 minutes. Take cake from oven. Spread marshmallow while still hot. Spread icing when partially cooled; swirl.