Butternut Squash These Ginger Butternut Squash Muffins are absolutely delicious! Butternut Squash is a winter squash. It has a delicate, nutty flavor similar to a pumpkin. In fact, it's sometimes known as a crookneck pumpkin or a butternut pumpkin. It's a good source of fiber, vitamin C, vitamin A, magnesium, and potassium--  really good for