*I used one tablespoon. If you want a more intensely red cake, add up to one additional tablespoon food coloring.
**You need a nonstick tube pan/angel food cake pan for the angel food cake to be light and fluffy BUT I have made this recipe in a regular bundt can which you HAVE TO GREASE and grease is the enemy of angel food cake, so it will not rise and will be more dense. That being said, the "flat and dense" angel food cake was still delicious and completely worth making if you don't want to buy a special pan for this recipe - just be sure to grease your regular bundt cake pan and don't expect the the texture to be quite the same as your traditional angel food cake.