Heat oven to 350°F. Line a 9 x 5" loaf pan with parchment paper.
In a large bowl, mash the bananas with a fork.
Stir in peanut butter powder, egg and milk. Mix well.
Stir in oats, flaxseed and cinnamon until well combined. Pour mixture into prepared pan.
Bake 25-30 minutes, or until center is set. Cool before removing from pan, then cut into 1-inch strips.
