Heat oven to 350℉.
Spray three 6 inch pans with baking spray. Set aside.
In a small bowl, whisk flour baking powder, baking soda, and vanilla powder together. Set aside.
With an electric mixer, beat butter and sugar until light and fluffy, about 2-3 minutes.
Mix in food coloring.
Add eggs, one at a time.
Beat until light and fluffy, about 1-2 minutes.
Add flour mixture alternately with buttermilk, beginning and ending with flour mixture.
Stir in vinegar.
Divide evenly among prepared pans.
Tap to level.
Bake for 24 minutes, or until cake tests done.