1 c. butter, softened
2 c. flour
1 3/4 c. sugar
3 tbsp. cocoa
1 tsp. baking
1 tsp. vanilla
2 eggs
1/2 c. buttermilk
1 c. Coca-Cola
1 1/4 c. miniature marshmallows

Combine all except Coca-Cola and marshmallows at medium speed in a large mixing bowl. Beat for 1 minute. Add Cocoa-Cola and blend. Add marshmallows and mix by hand. Bake in a preheated 350 degree oven for 40 to 45 minutes in a greased and floured 9 x 13 inch pan.