Peanut Butter Waffles

Name: Peanut Butter Waffles
Ingredients: 1 ¾ cups all-purpose flour (spooned and leveled); 2 tablespoons sugar; 2 teaspoons baking powder; 1 teaspoon baking soda; ½ teaspoon coarse salt; ¼ cup (½ stick) unsalted butter, melted, plus more for brushing waffle iron; 6 tablespoons creamy peanut butter; 2 cups buttermilk; 2 large eggs; 3 bananas, sliced, for serving; ¾ cup pure maple syrup, for serving