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

Combine soda and buttermilk. Put all ingredients in large bowl except Coke and marshmallows. Blend well at low speed on mixer. Add Coke and blend well, stir in marshmallows. Pour in greased and floured 9"x13" cake pan. Bake at 350 degrees for 40 or 45 minutes.