A corn on the cob is an item made from 1 corn and 2 Pins. The recipe is shapeless, and 1 corn on the cob takes 10 bites to eat. You right-click with it in your hand and one bite will be taken. Each bite restores 0.5 hunger points, so a full corn on the cob will restore 5 hunger points. They are rarely found in dungeon, nether fortress, and temple chests.