Makes one loaf, about 8 inches in diameter (4 servings).
A note about substitutions: The Quest powder I used is a whey/casein blend. While you may be able to get the same texture with another unflavored whey/casein blend, or with whey and coconut flour, for example, I don't think it would taste quite as good.
Using applesauce in place of the coconut oil, the macros are:
Prot: 28g, Carbs: 7g (3g fiber, 2g sugar), Fat: 11g, Cal: 233