Apple Peanut Butter Cake

Ingredients

• 3/4 cup all-purpose flour
• 1/4 cup whole wheat flour
• 1 teaspoon baking powder
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon salt
• 1/8 teaspoon ground allspice
• 3/4 cup packed brown sugar
• 2 tablespoons butter, softened
• 1 egg
• 1/4 cup applesauce
• 1/2 teaspoon vanilla
• 3/4 cup tart apple, such as Granny Smith, peeled and diced
• 1/4 cup peanut butter-flavored pieces
• Peanut Butter Glaze (below)