1. 1. Prepare Your Waffle Iron: Preheat your waffle iron according to the manufacturer’s instructions. Lightly spray the cooking plates with cooking spray or brush with a little melted butter to prevent sticking.

2. 2. Combine Dry Ingredients: In a large mixing bowl, whisk together the all-purpose flour, protein powder, granulated sugar, baking powder, baking soda, and salt. Make sure there are no lumps and all ingredients are evenly distributed.

3. 3. Mix Wet Ingredients: In a separate medium bowl, whisk together the plain Greek yogurt, milk, large egg, melted butter (or oil), and vanilla extract until smooth and well combined.

4. 4. Combine Wet and Dry: Pour the wet ingredient mixture into the dry ingredient mixture. Stir gently with a spatula or whisk until just combined. Be careful not to overmix; a few small lumps are perfectly fine and will result in a more tender waffle. Overmixing can lead to tough waffles.

5. 5. Cook the Waffles: Pour about 1/2 to 3/4 cup of batter (or the amount recommended by your waffle iron’s instructions) onto the preheated waffle iron. Close the lid and cook for 3-5 minutes, or until the waffle is golden brown and steaming stops. The exact time will depend on your waffle iron and desired crispness.

6. 6. Serve Immediately: Carefully remove the cooked waffle from the iron using a fork or tongs. Repeat with the remaining batter. Serve your protein waffles warm with your favorite toppings.