Being Polish this is a staple in my home and has been since childhood. I love this recipe from Jenny. Polish Chrusciki recipe from Jenny Jones (Jenny Can Cook) - Also called Angel Wings, light as air and easy to make.
While it is a bit of a comedic strip, it does provide some expansion on extended wing design. Originally had thought of opening up the centre to allow access for the pilot chute, but then thought it may be a bit too much wing disruption.