Preheat your waffle iron according to the manufacturer's instructions.

In a large bowl, whisk together the flour, sugar, baking powder, and salt.

In another bowl, beat the eggs, then add the milk, melted butter, and vanilla extract. Mix well.

Pour the wet ingredients into the dry ingredients and stir until just combined. Do not overmix; a few lumps are fine.

Lightly grease the waffle iron with non-stick spray or a little melted butter.

Pour the batter onto the hot waffle iron (about 1/2 cup per waffle, depending on size) and cook until golden brown and crispy, about 3-5 minutes.

Serve immediately with your favorite toppings like maple syrup, fresh berries, whipped cream, or butter.