Acorn squash. A winter squash shaped like an acorn but up to 20 x 10-12 cm (8 x 4-5 inches). Has smooth, hard rind which is widely ribbed and changes from dark green to orange during storage. Pale orange flesh is quite firm in texture, slightly sweetish and there is a large seed cavity. Good mashed with plenty of black pepper and butter, or stuffed and baked.