In a large bowl, combine the flour, baking powder, baking soda and salt. Combine the eggs, apple juice concentrate, peanut butter, milk and butter; stir into dry ingredients just until moistened. Coat 12 muffin cups with cooking spray. Spoon half of the batter into cups. Spoon about 1 1/4 teaspoons spreadable fruit into the center of each; top with remaining batter. Bake at 350° for 15-20 minutes or until a toothpick inserted into muffin comes out clean. Cool for 5 minutes before removing from pan to a wire rack to cool completely. Yield: 1 dozen.