Preheat the waffle iron. Set it to medium or the manufacturer’s standard waffle setting. Let it heat fully so your waffles crisp properly.

Make oat flour if needed. If using rolled oats, blitz them in a blender until very fine. Aim for a flour-like texture with no visible flakes.

Mix dry ingredients. In a bowl, whisk 3/4 cup oat flour, 1 scoop (about 25–30 g) protein powder, 1 1/2 teaspoons baking powder, a pinch of baking soda, 1/8 teaspoon salt, and 1/2 teaspoon cinnamon. Break up any clumps so the batter stays smooth.

Combine wet ingredients. In a separate bowl, whisk 1/2 cup plain nonfat Greek yogurt, 1/2 cup unsweetened almond milk, 2 egg whites (or 1 whole egg + 1 white), and 1 teaspoon vanilla extract. Sweeten to taste with 1–2 teaspoons zero-calorie sweetener or 1 tablespoon maple syrup/honey.

Bring it together. Pour the wet mixture into the dry and whisk gently until just combined. The batter should be pourable, not runny. If it’s too thick, add a splash of milk; if too thin, sprinkle in a teaspoon more oat flour.

Rest briefly. Let the batter sit for 3–5 minutes to hydrate the oats and activate the leavening. This helps you get a better rise and a crisp edge.

Prep the iron. Lightly coat the hot waffle plates with oil spray. Avoid over-spraying, which can make waffles greasy and reduce crisping.

Cook the waffles. Pour enough batter to cover about 2/3 of the waffle grid (it spreads as it closes). Close the lid and cook until steam subsides and the waffle is golden, usually 3–5 minutes depending on your iron.

Check for doneness. The waffle should release easily and feel set, not soft or damp. If needed, cook another 30–60 seconds for extra crispness.

Repeat and hold warm. Keep cooked waffles on a wire rack in a low oven (200°F/95°C) while you finish the batch. This prevents sogginess.

Serve with smart toppings. Add berries, a spoon of yogurt, or a drizzle of sugar-free syrup. For more protein, mix powdered peanut butter with water and spread over the top.