If your slow cooker is busy with another recipe—or you don’t have one—there’s another reliable way to keep mashed potatoes warm without drying them out: use a bain-marie. This restaurant ...

If you've made your mashed potatoes well in advance of your main course, though, how do you keep them warm? If you're celebrity chef Rachael Ray, you use a bain-marie. A bain-marie might sound ...

Your first instinct might be to keep the potatoes on the stove or pop them in the oven at a low temperature or the "warm" setting. While that can work, it often dries out the potatoes more than you’d ...