Heirloom. This variety, Waltham Butternut, has a hard, yellow to tan exterior but delicious sweet, orange flesh inside. Exceptional quality, no stringiness. This long-lasting squash stores all winter. Try it steamed, boiled or baked. Extremely rich in vitamin A. This is the most common winter squash used to make the popular, creamy soup by the same name, and it is a popular baking squash. A 1970 All-America Selections winner.