Prepare the egg wash by mixing the egg and water, set aside.
Lay out one of the wrappers and place a Kit Kat across the wrapper, diagonal from the corner and roll it up, making sure to bring the edges of the wrapper in as roll.
Brush the final corner with some egg wash and seal up the Kit Kat very well.
In a pot, pour in the oil and bring to a temperature of 350-360℉.
Fry them one or two at a time, as they get golden quickly.