4 strips bacon, roughly chopped
1 cup all-purpose flour
1/2 tablespoon sugar, plus more for sprinkling
1/2 teaspoon baking soda
1/4 teaspoon salt
1 cup buttermilk
4 tablespoons unsalted butter, melted
1 egg, separated
Vegetable oil, for brushing waffle iron
2 bananas, sliced 1/2-inch thick
3 tablespoons maple syrup
2 tablespoons peanut butter, room temperature
Whipped cream, for serving
1. Cook bacon in a skillet until crisp; transfer to a paper towel with a slotted spoon. Reserve fat in the pan. Heat waffle iron to hot.
2. Whisk together flour, sugar, baking soda and salt in a large bowl. Whisk together buttermilk, butter, and yolk in a small bowl, then gently stir into dry ingredients until combined. Whip egg whites to stiff peaks, then fold into batter. Gently stir in bacon.
Brush waffle iron with oil; cook waffles to a golden brown.
3. Meanwhile, heat bacon fat over medium-high heat until hot. Add bananas and sear on both sides until well browned on both sides. Transfer with a slotted spoon to a small bowl. Whisk together maple syrup and peanut butter until smooth; stir into bananas. Top one waffle with banana mixture and sauce; cover with remaining waffle. Serve immediately with whipped cream.