buttermilk waffle recipe

Ingredients: 2 cups all-purpose flour 2 tablespoons sugar 2 teaspoons baking powder 1 teaspoon baking soda 1/2 teaspoon salt 2 cups buttermilk 2 large eggs 1/4 cup unsalted butter, melted 1 teaspoon vanilla extract Cooking spray or additional melted butter for the waffle iron