Mashed potatoes are one of the coziest (and tastiest) dishes on this great big globe, but if you happen to make too big a batch, they tend to lose some of their luster when you reheat them. They lose some of their comforting creaminess and fluff and theyre just not as well suited as they once were for tucking into a bowl topped with hot gravy. But They are still excellent in baked dishes like this.