Heat oven to 350 degrees. ... Cool completely after cake is cooled. Take a fork punch holes into cake after punching holes. ... and place in refrigerator.
Cook peeled potatoes in unsalted ... place until doubled. Punch down; spread in 5 (9 inch) greased layer cake pans (or ungreased foil pans); ... punch surface with hole. Fill holes with bits of butter. Cover ... water for potato water.