Preheat a waffle iron. Lightly grease it with melted butter.

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

In a medium bowl, beat the eggs, then add the milk, melted butter, sugar, and vanilla and whisk until well combined.

Add the wet ingredients to the dry ingredients and mix until just combined. A few lumps are ok.

Scoop 1/2 cup of batter for each waffle into a Belgian waffle maker, or scoop an appropriate amount for your waffle maker. Cook for 4 minutes, or until golden brown and lightly crisp. The timing will depend on your waffle iron.

Serve with more butter and maple syrup.