Preheat your waffle iron according to manufacturer's instructions.
In a large bowl, whisk together the flour, sugar, baking powder, and salt.
2 cups all-purpose flour
In a separate bowl, whisk together the egg yolks, milk, vegetable oil, and vanilla extract.
2 cups all-purpose flour
Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix.
In a clean bowl, beat the egg whites until stiff peaks form. Gently fold them into the batter.
2 cups all-purpose flour
Spoon the batter onto the preheated waffle iron and cook according to the manufacturer's instructions, typically 3-5 minutes, until golden brown and crisp.
Serve immediately with your favorite toppings.
Notes
This is a basic waffle recipe that can be customized with different extracts, spices, or mix-ins like chocolate chips or berries. Adjust cooking time for your desired crispness.