Preparation Place mashed potatoes, cheese, egg, and 3 tbsp flour in a bowl and stir to combine. Take a scoop of the potato mixture and form into patties. Place the remaining 4 tbsp of flour on a plate. Lightly coat the potato patties in the flour. Heat a thin layer of the oil or butter in a large sauté pan over medium heat. Cook the potato cakes for 3 minutes on each side for a total of 6 minutes. Serve as is or with accompaniments. This recipe was originally published on Weelicious as "Mashed Potato Cakes".