Acorn squash, shaped like their namesake, are winter squash that are up to 6 inches (15 cm) in diameter and have deeply ridged, green skin and orange flesh.
To prepare an acorn squash for cooking:
Cut in half with a heavy knife. Tap the inserted knife with a kitchen mallet if the skin is very hard. Using a sharp-edged spoon, scrape out the seeds and fibers. Remove the skin with a vegetable peeler or paring knife.For other winter squash, see banana squash, butternut squash, pumpkin, and spaghetti squash.