Butternut squash, also known in Australia as Butternut pumpkin, is a type of winter squash. It has a sweet, nutty taste that is similar to pumpkin. It has yellow skin and orange fleshy pulp. When ripe, it turns increasingly deep orange, and becomes sweeter and richer. It grows on a vine. The most popular variety, the Waltham Butternut, originated in Stow, Massachusetts, on what is now the Butternut Farm Golf Club.