Design Eat Repeat

3 Preheat your waffle iron to the highest setting. 
0 In a large mixing bowl, whisk together all-purpose flour [adjustable](2 cups), cornstarch (½ cup), granulated sugar (¼ cup), baking powder (1 tablespoon), baking soda (½ teaspoon), and salt (¼ teaspoon)[/adjustable]. Set aside.
1 In a separate medium-sized bowl, melt the butter [adjustable](¼ cup). Once melted, add in the milk (1½ cups) and vegetable oil (¼ cup)[/adjustable], then give it a quick stir until combined.
5 Next, add [adjustable]2[/adjustable] egg yolks (not the whites yet!) and vanilla extract ([adjustable]1 [/adjustable]teaspoon) and mix until combined. Tip: We're adding the milk to the hot butter first so that it will cool it down and prevent you from accidentally cooking the egg yolk!
6 Add the milk mixture to the dry ingredients and mix until just combined (don’t stir too much or you can cause the batter to become tough!).
2 In a clean small bowl, use an electric mixer to beat the [adjustable]2 [/adjustable]egg whites for 1-2 minutes until light, fluffy, and stiff (”stiff peaks”). Use a spatula (not the electric mixer) to *gently* fold the egg whites into the batter. You want to mix until it's about 90% combined, where you can still see some streaks of egg whites.
7 Spray waffle iron with nonstick cooking spray, then scoop batter into the preheated waffle iron. I fill my round waffle iron with ¾ cup of batter, then spread it to the ends. Tip: The batter will be thick & a little lumpy, which is why you want to help spread it to the edges of the waffle iron.
8 Cook until golden brown, or to your liking! Note that to get a nice crispy waffle, you will need to cook it a little longer than you would typically do. A golden color is what we're going for! My iron takes 4-5 minutes to reach this color. 
4 Serve immediately or keep them on a baking sheet or oven rack in the oven at 200℉ to stay warm & crispy. Top with your favorite toppings and enjoy!