Instructions: Combine Coca-Cola and buttermilk; set aside.

Beat butter at low speed with an electric mixer until creamy. Gradually add sugar; beat until blended. Add egg and vanilla; beat at low speed until blended.

Combine flour, cocoa, and soda. Add to butter mixture alternately with cola mixture; begin and end with flour mixture. Beat at low speed just until blended.

Stir in marshmallows. Pour batter into a greased and floured 13- by 9-inch pan.

Bake at 350 degrees for 30 to 35 minutes. Remove from oven; cool 10 minutes. Pour Coca-Cola Frosting over warm cake; garnish, if desired.

This recipe yields 12 servings.

Comments: Dont make the frosting ahead - you need to pour it over the cake shortly after baking.

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