Preheat the waffle maker according to the manufacturer's instructions.

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

In another bowl, combine the egg, milk, melted butter, and vanilla extract. Whisk until smooth.

Pour the wet ingredients into the dry ingredients. Stir gently until combined.

Lightly grease the preheated waffle maker with cooking spray or oil.

Pour about 1/2 cup of batter onto the center of the waffle maker.

Close the lid and cook until the indicator light signals that it’s done, usually about 5 minutes.

Carefully remove the waffle and serve warm with desired toppings.