Acorn squash (Cucurbita pepo), also called pepper squash, is a winter squash with distinctive longitudinal ridges on its exterior and sweet, yellow-orange flesh inside. As the name suggests, its shape resembles an acorn. Acorn squash have sweet, yellow-orange flesh that has a slightly nutty flavor. Acorn squash is most commonly baked, and savory recipes, it may be stuffed with rice, meat or vegetable mixtures.