To microwave butternut squash, poke holes into the skin and flesh with a fork. Slice the top and bottom of the squash off, then microwave the squash for roughly 3 1/2 minutes. Let the squash cool, then slice it into cubes for later use.
Butternut squash can also be prepared in the microwave as a dessert. Begin by cutting a butternut squash in half, then removing the seeds. Dab butter over the squash, then sprinkle brown sugar and cinnamon all over it. Cover the squash, making sure the cover is not touching the surface of the squash, and place it in the microwave for 10 minutes. Check the squash with a fork. If the squash is soft, let it cool, and serve; otherwise, let it cook for another eight to 10 minutes, until the butter and sugar have melted and the squash is soft.
Although it is technically a fruit, butternut squash is high in fiber and various vitamins and minerals. It is especially recommended for pregnant mothers because of its high folate content, which helps prevent various spine- and brain-related birth defects. As implied by its orange hue, butternut squash is also high in carotenoids, which protect against heart disease.