Abstract: Apparatus for continuously, quickly and gently cooking and leaching food pieces such as compacted soy bean products with a cooking liquid, such as water, at elevated temperature comprising an elongate tank for the liquid wherein the tank has a product infeed end and a product discharge end. A driven endless conveyor having an upper flight passing through the liquid in the tank carries food pieces on its upper flight through the hot liquid. There is provided a plurality of means along one or both sides of the tank for withdrawing liquid from the tank at spaced apart points along the side of the tank, means for heating the withdrawn liquid and means for returning the heated liquid to the tank at a plurality of points adjacent the center line thereof.