Cocoa Branana Muffins

• 2 egg whites
• 1 1/2 all bran
• 1 vegetable cooking spray
• 1 browned
• 1/2 muffin coated with cooking spray (pan)
• 180 ml skim milk
• 150 gr ripe banana (sliced)
• 130 gr all purpose flour
• 100 gr sugar
• 60 ml vegetable oil