When it comes to making the best mash, timing is key. Potatoes can take anywhere from 15-20 minutes to cook, depending on their size and type. To avoid overcooking, check the potatoes periodically and remove them from the heat as soon as they are fork tender. Overcooking the potatoes can lead to a mushy texture, so it is important to keep an eye on them! There is a big difference between a creamy and mushy mash!