Easy Red Velvet Cake

Ingredients
- 1 box butter cake mix
- 1 tsp cocoa
- 1 tsp vanilla
- 1 c buttermilk
- 1 bottle red food coloring
- 1 stick margarine softened
- 3 eggs
- 1 tsp baking soda
- 1 Tbsp vinegar
Directions
- Mix cake mix with cocoa
- Add vanilla buttermilk food coloring margarine and eggs
- Blend until moistened
- Add soda vinegar
- Beat 4 minutes at medium speed
- Bake at 375 degrees in three layers for 30 minutes
- Use Cream Cheese Frosting