porringer (n.)

"a porridge-dish; a small vessel deeper than a plate, usually with upright sides, a nearly flat bottom, and one or two ears," late 15c., alteration of potynger, potager "small dish for stew," from Middle English potage (see pottage) by the same course of changes that produced porridge; and with unetymological -n- by 1530s (compare passenger).