Preheat your waffle iron according to the manufacturer's instructions.

In a mixing bowl, combine the protein powder, almond flour, eggs, baking powder, almond milk, optional vanilla extract, and optional sweetener. Mix well until you have a smooth batter.

Lightly grease the waffle iron with cooking spray or a small amount of oil.

Pour ¼ cup of batter onto the preheated waffle iron, spreading it evenly.

Close the waffle iron and cook according to the manufacturer's instructions until the waffles are golden brown and crispy.

Repeat with the remaining batter. (Should make 5 small waffles)

Serve the low-carb protein waffles warm with your favorite toppings.