Mix mashed potatoes, eggs, flour, onion, salt and pepper in large mixing bowl. Heat cast-iron skillet with about 1/4 cup of oil in it until the oil is nearly smoking. Test skillet by dropping a tiny bit of batter in it. It should instantly sizzle and start browning around the edges. When the skillet is hot enough, drop a heaping tablespoons of batter into the skillet. Mash down slightly. When they have browned on one side, turn them carefully with a spatula to brown on the other side. Remove to drain individually on paper towels. Wipe skillet and add more oil or bacon fat for second batch. Stack pancakes carefully for serving after they have all drained individually.
© 1997, 1998, 1999, 2003 Portia Isaacson Bass and Veta Leigh. All rights reserved.