Begin by preheating your waffle iron. For a crispy texture, select a higher heat setting if your waffle iron has adjustable settings.
In a sizable mixing bowl, combine the all-purpose flour, granulated sugar, baking powder, and salt. In a separate medium bowl, whisk together the milk, melted unsalted butter, large eggs, and vanilla extract. Gradually pour the wet ingredients into the dry ingredients, stirring gently until the batter is just mixed.
Once the waffle iron is hot, lightly grease it with butter or cooking spray. Pour approximately 1/3 cup of batter onto the waffle iron for each waffle, adjusting the amount based on the size of your waffle maker.
Cook the waffles until they are a rich golden brown. To maintain their crispiness, place the cooked waffles on a wire rack until ready to serve. Enjoy your waffles hot, topped with maple syrup, butter, or any of your favorite toppings.