2 c. flour
1 tsp. baking soda
1/4 tsp. salt
1/3 c. cocoa
1 c. sugar
1 egg
1/3 c. oil
1 tsp. vanilla
3/4 c. milk

FILLING:

1 stick butter
1 c. confectioners' sugar
3 heaping tbsp. marshmallow fluff
1 tsp. vanilla

Bake in 350 degree oven for 10 minutes.