Preheat your waffle iron to medium-high heat.
In a medium bowl, whisk together the coconut flour, sugar, baking soda, and salt until well combined.
In a separate 2-cup measuring cup, whisk together the milk, melted butter, eggs, and vanilla extract.
Pour the wet ingredients into the dry ingredients and whisk until the batter is smooth and free of lumps.
Lightly grease the waffle iron and pour approximately 3-4 tablespoons of batter onto the center of each waffle cavity.
Cook for 3-5 minutes, or until the waffles are golden brown and crisp. Serve immediately with your favorite toppings.