Cake mixture will be very thin. ... toothpick in cake. When toothpick comes out clean, cake is done. Pour icing over hot cake with marshmallows on top.
Preheat oven to 350 degrees. ... dissolve. Stir in buttermilk, set aside. Sift together ... 25 minutes. When cake is cool, frost. FROSTING: Beat ... speed until stiff. Spread.