Ingredients
1/2 cup butter, softened
1-1/2 cups sugar
2 eggs
2 bottles (1 ounce each) red food coloring
1 tablespoon white vinegar
1 teaspoon vanilla extract
2-1/4 cups cake flour
2 tablespoons baking cocoa
1 teaspoon baking soda
1 teaspoon salt
1 cup buttermilk
FROSTING:
1 tablespoon cornstarch
1/2 cup water
2 cups butter, softened
2 teaspoons vanilla extract
3-1/2 cups confectioners' sugar