Better Than Scratch Red Velvet Cake
["1 box Duncan Hines Butter cake mix", "1 tsp. vanilla", "1 bottle red food coloring", "3 eggs", "1 Tbsp. vinegar", "2 tsp. cocoa", "1 c. buttermilk", "1 stick margarine", "1 tsp. baking soda"]
["Mix cake mix and cocoa.", "Add vanilla, buttermilk, food coloring, margarine and eggs.", "Blend until moistened.", "Mix soda and vinegar and mix into cake mix.", "Beat four minutes at medium speed.", "Bake at 325\u00b0 in layers for 25 to 30 minutes."]
["Butter", "vanilla", "coloring", "eggs", "vinegar", "cocoa", "buttermilk", "margarine", "baking soda"]