I love desserts! ...but I don't use any refined sugar or flour. So I invented this while looking for a sugarless pumpkin muffin recipe. This recipe includes bananas and applesauce to sweeten, as well as agave nectar and stevia. These are two great natural sweeteners. Blue Agave nectar is low glycemic and tastes like honey. Stevia is a herb that is up to 300 times sweeter that sugar, has zero calories and is 0 on the glycemic index. The protein powder I like to use is whey protein. It has cocoa and stevia in it. This might affect the sweetness of the muffins. If the protein powder you use is sweet enough to drink in plain water, it should work just fine. You can use vanilla or chocolate flavored if you wish. These muffins are sweet, moist, and satisfying. Packed with vitamin A, protein, fiber, omega 3 and taste!