¼ cup butter
white flour, 6 to 8 ounces
½ teaspoon salt
½ teaspoon baking powder
3 cups freshly mashed potatoes with milk

Cut butter into flour until it forms large granules.  Add salt and baking powder, mix well.  Mix in potatoes.  Knead for a few minutes.  Roll out onto lightly floured board with floured rolling pin.  Cut into 2 rounds.  Cook on a dry griddle or skillet until brown on both sides.