2 cups self-raising flour
pinch of salt (will depend on how much salt was added to the potatoes)
2 tablespoons butter
1 to 1½ cups mashed potatoes
¼ cup milk
Preheat oven to 450F/200C.
Add the pinch of salt to the flour and cut in the butter.
Stir in the mashed potatoes and the milk until you have a stiff dough. Roll out loosely on a floured board, to about ½ inch thick.
Using a glass or other round cutter, cut into approximately 3-inch rounds. Sprinkle sesame seeds on top, if desired, and place on baking sheet.
Bake for 20-25 minutes or until the cakes start to turn golden. You can serve them split, with more butter slathered inside, or plain.
Note: If you don't have self-raising flour, add 1 teaspoon baking powder to 2 cups all-purpose (plain) flour.