1. Preheat your waffle iron: Plug in your waffle iron and allow it to heat up fully according to the manufacturer’s instructions. Most waffle irons have an indicator light that signals when it’s ready. Lightly grease the plates with cooking spray or a brush of oil if your waffle iron isn’t non-stick.

2. Combine dry ingredients: In a large mixing bowl, whisk together the all-purpose flour, protein powder, granulated sugar, baking powder, and salt. Make sure there are no lumps, especially from the protein powder, to ensure an even batter.

3. Mix wet ingredients: In a separate medium bowl, whisk together the milk, unsweetened applesauce (or mashed banana), large eggs, melted butter (or coconut oil), and vanilla extract until well combined and smooth.

4. Combine wet and dry mixtures: Pour the wet ingredient mixture into the dry ingredient bowl. Stir gently with a whisk or spatula until just combined. A few small lumps are perfectly fine; overmixing can lead to tough waffles. The batter should be thick but pourable.

5. Cook the waffles: Pour about 1/2 to 3/4 cup of batter (or the amount recommended by your waffle iron’s manufacturer) onto the hot, greased waffle iron. Close the lid and cook for 3-5 minutes, or until the waffle is golden brown and crispy, and steam stops escaping from the sides. The indicator light on your waffle iron will also usually signal when it’s done.

6. Remove and repeat: Carefully lift the cooked waffle from the iron using a fork or tongs. Place it on a wire rack to keep it crispy while you cook the remaining batter. Repeat the process until all the batter is used. Serve immediately with your favorite toppings.