Makes 10 mini donuts.
A note about substitutions: The Quest powder is a whey/casein blend, and casein bakes very differently than whey. If you want to replace this in the donut base with all whey, you'll need to add about 2 tablespoons coconut flour or 3-4 tablespoons oat flour. In the coconut topping you'd need to add 1 teaspoon coconut flour or 2 teaspoons oat flour.