Red Velvet Marble Cake

Directions

1. Preheat oven to 350°. Line bottoms of 2 greased 9-in. round baking pans with parchment; grease paper.
2. In a large bowl, cream butter and sugar until light and fluffy. Add eggs, 1 at a time, beating well after each addition. Beat in vinegar and vanilla. In another bowl, whisk flour and baking soda; add to creamed mixture alternately with buttermilk, beating well after each addition.
3. Transfer half the batter to another bowl; stir in cocoa and food coloring until blended. Alternately drop plain and chocolate batters by 1/4 cupfuls into prepared pans, dividing batter evenly between pans. To make batter level in pans, bang cake pans several times on counter.
4. Bake 30-35 minutes or until a toothpick inserted in center comes out clean. Cool 10 minutes before removing from pans to wire racks to cool completely.
5. In a large bowl, beat butter, confectioners’ sugar, vanilla and enough milk to reach a spreading consistency. Spread frosting between layers and over top and sides of cake.