Overview

Acorn squash is a winter squash with distinctive longitudinal ridges and sweet, yellow-orange flesh. It belongs to the species Cucurbita pepo, the same species as summer squashes like zucchini and crookneck squash, despite being classified as a winter squash. Its flavor is mild and nutty, with a texture that becomes tender and slightly fibrous when cooked.

Origin and history

Cucurbita pepo is native to Mesoamerica and was domesticated in what is now Mexico and the southern United States thousands of years ago [1]. Acorn squash is a modern variety developed from these ancestral gourds. It became widely cultivated in North America in the 19th and 20th centuries, valued for its small size, long storage life, and sweet flesh. The name “acorn” refers to the fruit’s shape, though it is also called pepper squash in some regions [2].

Varieties and aliases

  • Pepper squash
  • Table queen squash (a common commercial cultivar)
  • Golden acorn (a yellow-skinned variant)

Culinary uses

Acorn squash is typically halved, seeded, and baked or roasted, often with butter, brown sugar, maple syrup, or cinnamon to enhance its natural sweetness. It can also be steamed, microwaved, or stuffed with grains, meats, or vegetables. The skin is edible when cooked but can be tough; many recipes call for peeling after cooking. Common pairings include sage, nutmeg, pecans, and apples. In Mexican cuisine, winter squashes like calabaza are used in soups, stews, and candied preparations, though acorn squash is less traditional than varieties like calabaza de castilla.

Cross-cuisine context

Acorn squash has no direct analogue in Mexican cuisine, where the most common winter squash is Cucurbita moschata (calabaza de castilla), which has a denser, sweeter flesh and is used in calabaza en tacha (candied squash) and sopa de calabaza. In Korean cuisine, hobak (Korean pumpkin, Cucurbita moschata) is used in hobakjuk (pumpkin porridge) and hobak-tteok (rice cakes), but acorn squash is not a standard substitute. In Japanese cuisine, kabocha (Japanese pumpkin, Cucurbita maxima) is closer in texture and sweetness to acorn squash and is often used in nimono (simmered dishes) and tempura. Acorn squash can be used as a substitute for kabocha in many recipes, though its flavor is milder.

Notes for cooks

  • Acorn squash has a thinner skin than other winter squashes; it can be eaten but may be tough. Roasting with the skin on helps soften it.
  • Store whole acorn squash in a cool, dry place for up to one month. Cut squash should be refrigerated and used within a few days.
  • When selecting, look for a squash that feels heavy for its size with a dull, hard rind. Avoid squash with soft spots or shiny patches, which indicate early spoilage.