Preheat oven to 375F. Grease a large baking dish and set aside.
Cut waffles into 1-inch pieces and add to a large bowl. In a separate bowl, whisk together eggs, egg whites, almond milk, protein powder, 2 tbsp of brown sugar, vanilla, and cinnamon. Pour over waffles and stir everything together.
Whisk together brown sugar and butter. Pour into bottom of baking dish, followed by waffle mixture, and spread evenly. Top with extra cinnamon.
Bake for 50-60 minutes, or until a toothpick comes out clean. Top with your favorite toppings, like maple syrup, berries, crumbled bacon, or yogurt.
If your egg mixture is too lumpy, pulse it in the blender a few times to smooth it out. Click on the time in the instructions to start a timer!