The length of time that these waffles take to cook will vary depending on your waffle iron. I found that mine needed an extra 30-seconds to a minute beyond the highest setting to turn golden brown. Use a form to remove the waffles very carefully - they're very light with a super crispy exterior and will break easily.[br]ViShape protein powder is sweet cream flavored. If using a different brand of powder, you might need to add some vanilla extract and sweeten to taste.
In a mixing bowl, combine flour, protein powder, cornstarch, malted milk powder, baking soda, salt, and baking powder. Mix well. Stir in the milk, oil, and egg yolk.
Add the egg whites to a second bowl. Use a hand mixer to whip the eggs whites until they're thick and shiny and hold a stiff peak. Fold the egg whites into the waffle batter.
Spray your waffle iron with cooking spray. Add 1/4 cup batter and cook on highest setting, continue cooking and extra minute or so, keeping a close eye on it so your waffle doesn't burn. Carefully remove from waffle iron. Keep warm on a rack set in a 200-degree oven until ready to serve. Repeat with remaining batter.