Acorn squash is easy to halve once you learn how to do it. You need a good knife and a cutting board. First, microwave the whole acorn squash for 2-3 minutes. This will soften the squash up enough to make it easier to cut. Next, slice the acorn squash down the center from the stem at the top all the way to the bottom. Scoop out the seeds and pulp prior to cooking with your preferred recipe.