Step 1: Prepare the Dry Ingredients

In a large mixing bowl, whisk together the flour, granulated sugar, baking powder, and salt. Set this dry mixture aside.

Step 2: Separate the Eggs

Carefully separate the eggs, placing the egg yolks in one bowl and the egg whites in another. Beat the egg whites until stiff peaks form. This will give your waffles a fluffy texture.

Step 3: Mix the Wet Ingredients

In another bowl, combine the egg yolks, milk, melted butter, and vanilla extract. Mix well until smooth. Pour the wet mixture into the bowl of dry ingredients and stir until just combined. Do not overmix; a few lumps are okay.

Step 4: Fold in the Egg Whites

Gently fold the beaten egg whites into the batter with a spatula. This should be done gradually, ensuring the batter stays light and airy. Do not overmix; folding the egg whites gently is key for fluffy waffles.

Step 5: Preheat the Waffle Iron

Preheat your waffle iron according to the manufacturer’s instructions. Lightly grease the waffle iron with cooking spray or a thin layer of melted butter to prevent sticking.

Step 6: Cook the Waffles

Pour an appropriate amount of batter into the preheated waffle iron (usually about 1/2 to 3/4 cup, depending on the size of your waffle maker). Close the lid and cook until the waffles are golden brown and crispy. This typically takes 3-5 minutes, but the cooking time may vary depending on your specific waffle iron.

Step 7: Serve Immediately

Carefully remove the waffles from the iron and serve them immediately. Repeat with the remaining batter, greasing the waffle iron between batches if necessary.