Preheat your Rotary Waffle Maker and lightly grease it if needed.

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

In another bowl, beat the egg, then mix in the milk, melted butter, and vanilla extract.

Pour the wet ingredients into the dry ingredients and stir until just combined (don't overmix).

Pour a ladle of batter into the Rotary Waffle Maker, close it, and rotate for even cooking.

Cook for about 3-5 minutes or until golden brown and crispy.

Carefully remove the waffle and repeat with the remaining batter.