Add banana, oats, maple syrup, oat milk, cinnamon and baking powder to a blender and blend until smooth.
Place a non-stick pan on medium-high heat and add a couple of spoonfuls of pancake batter. Cook for 2-3 minutes on each side, until browned underneath, then flip. Repeat with the rest of the batter.
Serve pancakes immediately with maple syrup, banana and peanut butter.