1 c. butter (soft)
2 c. all-purpose flour
1 3/4 c. sugar
3 tbsp. cocoa
1 tsp. baking soda
1 tsp. vanilla
2 eggs
1/2 c. buttermilk
1 c. coca cola
1 1/2 c. mini marshmallows

Blend all together with mixer except marshmallows (do by hand). Use a 13 x 9 inch greased pan at 350 degrees for 35-50 minutes and cool.