Spray your waffle iron with a non-stick cooking spray before preheating it. Preheat on high heat.
In a medium-sized mixing bowl (or KitchenAid Stand Mixer fitted with a paddle attachment), beat together the eggs, buttermilk, melted butter, and vanilla.
In another bowl whisk together the dry ingredients.
Combine the wet and dry ingredients together until almost smooth.
Using a ladle, ladle about ⅓ cup batter. Using the back of the ladle or a silicone spatula smooth out so the waffle iron is completely covered. Cook for 2 to 3 minutes (depending on your waffle iron), until the iron stops steaming and waffles are golden in color.
Carefully remove the waffle from the waffle iron, and place on a wire rack to cool until you are ready to serve.