1. Preheat oven to 180 degrees C.
  2. Combine all dry ingredients in a large mixing bowl.
  3. Place bananas, egg yolks, peanut butter, coconut oil and warm water in a blender and blend until smooth.
  4. Pour into the dry mixture, mix well
  5. Roughly chop the chocolate and stir through.
  6. Spoon into a greased and lined cake tin and bake for 15-20 minutes.
  7. Allow banana cake to cool for 15 minutes and then remove from tin.
  8. Serve and enjoy.