Combine the eggs, cottage cheese, oats, protein powder, baking powder, and vanilla extract in a blender. Blend on high speed for 60-90 seconds until the mixture is completely smooth with no visible chunks of oats or cottage cheese. This thorough blending is essential because it breaks down the oats into a fine flour-like consistency and ensures the cottage cheese distributes evenly, creating a cohesive batter that cooks properly. I like to scrape down the sides halfway through blending to catch any ingredients stuck to the walls.

Preheat your waffle iron on medium-high heat for 3-5 minutes until fully heated and a light mist of water sizzles immediately on contact. While the iron heats, let the batter from Step 1 rest for 1-2 minutes—this allows the baking powder to activate slightly and helps the waffles cook more evenly. Once the iron is ready, lightly grease it with cooking spray or a small amount of butter, then pour 1/2 to 2/3 cup of batter onto the center of the iron (the amount depends on your waffle iron size). Close the lid immediately and cook until the edges turn golden brown and crispy, about 4-6 minutes. I find that waiting until steam stops coming from the sides is a good indicator the waffle is done.

Carefully remove the waffle from the iron using a fork or small spatula and transfer to a serving plate. Serve immediately while hot and crispy, topped with your choice of Greek yogurt, fresh berries, maple syrup, nut butter, or honey. These waffles are best enjoyed right off the iron when the edges are at their crispiest.