Chocolate Banana Cake with Peanut Butter Cream Cheese Frosting

Ingredients

• cooking spray
• 1 1/2 cups all-purpose flour
• 3/4 cup white sugar
• 1/2 cup whole wheat flour
• 1/4 cup unsweetened cocoa powder
• 2 teaspoons baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon salt
• 2 large bananas, mashed
• 3/4 cup buttermilk
• 1/2 cup egg whites
• 1/3 cup unsweetened applesauce
• 1 egg
• 1 teaspoon vanilla extract
• 1 (8 ounce) package cream cheese (such as Philadelphia®)
• 1/4 cup creamy peanut butter
• 1/4 cup confectioners' sugar
• 1 banana, sliced