This make-ahead loaded mashed potato casserole is the ultimate stress-free side dish for holidays and potlucks. Creamy Yukon Gold potatoes are mixed with butter, cream cheese, sour cream, and cheddar, then topped with bacon and green onions for a dish that tastes like you spent all day in the kitchen.
For best results, use Yukon Gold potatoes and shred your own cheddar cheese. Do not rinse potatoes after draining; the starch helps the casserole hold together. Warm the dairy before adding to hot potatoes to prevent lumps. If the top browns too fast, tent with foil for the last 10 minutes. This casserole can be assembled up to 48 hours in advance or frozen unbaked for up to 3 months.
Keywords: mashed potato casserole, loaded mashed potatoes, make-ahead casserole, holiday side dish, cheesy potatoes, bacon and cheese potatoes