My Favorite Buttermilk Waffles

Bahan-bahan (10 porsi)

• 1 and 3/4 cups (219g) all-purpose flour (spooned & leveled)
• 1 and 1/2 teaspoons baking powder
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 3 large eggs, separated
• 1/2 cup (8 Tbsp; 113g) unsalted butter, melted and slightly cooled
• 1/3 cup (67g) granulated sugar
• 1 and 3/4 cups (420ml) buttermilk*
• 1 teaspoon pure vanilla extract
• toppings: butter and maple syrup