Separate eggs and beat egg whites until they form stiff peaks. In a medium bowl, beat egg yolks with butter and coconut oil. In a separate bowl, mix whey protein, soy flour, wheat bran, walnuts, cinnamon, stevia and baking powder. Beat dry mixture into egg yolk combination. Gently fold egg whites into batter and pour into a buttered nonstick muffin pan. Bake in a preheated oven at 350 for 30 minutes, or until inserted toothpick comes out clean.