Cooking spaghetti squash in the microwave is quick and easy! First, pierce the squash several times with a fork or knife to allow steam to escape. Microwave it on high for about 8-12 minutes, depending on its size, until it feels soft. Let it cool a bit before cutting it open and scooping out the seeds. What kind of dish are you planning to make with your spaghetti squash? I'd love to hear how you plan to enjoy it!