Enjoy the richness of a loaded baked potato in convenient casserole form. This comforting, cheesy dish makes a great addition to a buffet table, or can serve as a cozy main dish with some salad on the side. You can also prepare our twice baked potato casserole recipe one day in advance and chill the unbaked dish, covered, in the refrigerator. Let the dish come to room temperature before popping it in the oven.