We'll dive into how long ... for mashed potatoes. Boil as directed, then cool completely before storing in an airtight container in the refrigerator for up to two days. Reheat in the microwave ...

Plus, a few tips for reheating mashed potatoes using your oven, stovetop, slow cooker, or even just your microwave ... Pop your frozen potatoes into a slow cooker and set it on low heat for ...