Ingreadient

• 1 cup whole-wheat flour (see cook's note)
• 1/2 cup all-purpose flour (see cook's note)
• 1 teaspoon baking powder
• 1 teaspoon ground cinnamon
• 1/2 teaspoon baking soda
• 1/2 teaspoon kosher salt
• 5 tablespoons coconut oil, melted
• 1/4 cup packed dark brown sugar
• 1/4 cup maple syrup
• 1 teaspoon pure vanilla extract
• 2 large egg whites, at room temperature
• 1 1/2 cups mashed very ripe banana (about 3 large bananas)
• 1/2 cup chopped walnuts, optional