Yum--these are so good. I don't know how similar they are to potato latkes, but this is how my mother taught me to make them.
Step 3: Fry in butter or vegetable oil. Just like regular pancakes, the first flip is always the most precarious.
Step 1: pat leftover mashed potatoes into a flat disk. If they get too thick, they are more likely to fall apart. Step 2: sprinkle with flour on both sides.