My red velvet cake calls for using only 1 tsp. of cocoa, made into a paste with the red food coloring. After everything else is mixed, add the vinegar to the baking soda, which will "fizz" then mix in. This comes out much lighter and moist. I also have a Red Velvet Icing that is lighter that my family prefers to the heavier tasting cream cheese. Make a white sauce, boiling 5 tsp. flour with 1 cup of milk & cool. Blend 1/2 cup Crisco, 1/2 cup margarine & gradually blend in 1 cup sugar and pinch of salt. Beat 10 minutes--no less. Add white sauce & 1 tsp vanilla. Fluffy & delicious! Requested for every family dinner.