Preheat waffle maker. Spray generously with nonstick cooking spray or generously grease with butter.
In a large bowl whisk together flour, baking powder, baking soda, and salt.
In a separate large bowl, whisk together the buttermilk, eggs, melted butter, vanilla, and sugar until blended. Add dry ingredients to wet ingredients and mix until just combined.
Pour batter into a preheated prepared waffle iron; cook according to manufacturer's directions or when steam stops.
Top with maple syrup, peanut butter, honey, or fresh fruit preserves. Makes 4 belgian waffles.
