Combine dry ingredients: In a medium bowl, whisk together flour, baking powder, and salt.

Combine wet ingredients: In a separate bowl, whisk together milk, melted butter, egg, and vanilla extract.

Combine wet and dry ingredients: Gradually add the wet ingredients to the dry ingredients, stirring until just combined. Don't overmix.

Cook the waffles: Preheat your waffle iron. Pour batter into the waffle iron and cook according to the manufacturer's instructions.

Serve: Serve waffles immediately with your favorite toppings, such as butter, syrup, fruit, or whipped cream.

For a crispier waffle:

Cook the waffle for an extra minute or two.

For a fluffier waffle:

Let the batter rest for 5-10 minutes before cooking.

Enjoy your delicious, classic waffles!