When ready to cook, preheat a large skillet over medium heat, add butter and melt.
Using clean hands, mix mashed potatoes, egg, and enough flour to form a “batter” that is quite thick, not creamy, and “mounds.” Add salt and pepper to taste and any optional ingredients as desired.
The amount of flour needed is going to be dependent on how creamy and how rich the original mashed potatoes are – the more butter, cheese, etc. in the original mashed potatoes, the more flour will be needed. Do try to add as little flour as possible, though. Better to have a potato cake that runs a bit when heated than one that tastes of a lot of flour.
Mix right before frying and keep the potato mixture cold; by the time the outside is nicely browned and crunchy, the inside should be heated through and there is less chance they’ll become too “oozy” by the time they are done when you start with cold ingredients.
To cook, pick up about a quarter of the batter in one hand and form into a patty, much like a burger patty is formed. Place it into one palm and press and turn into a uniform, round, flat shape.
Add to the hot pan; brown very slowly in the hot butter, turning once. Best if eaten at once.
Notes:
Keywords: Family Recipe, Freezes Well, hearty sides, Irish, leftover potatoes, leftover vegetables, Leftovers, Potatoes, Side.