Pat turkey, stuffing, and vegetables dry with paper towels before layering to prevent a soggy casserole and ensure crispy top edges during baking.

Mix cranberry sauce with mayonnaise to create a tangy sauce that prevents dryness while binding layers together and adding moisture throughout the casserole.

Mix shredded cheddar with crushed stuffing crumbs and bake on a separate sheet at 375°F for 5 minutes, then top the casserole in the final 10 minutes for maximum crispiness.

Bring all leftovers to room temperature before assembling to ensure even, faster cooking and prevent the outer edges from overcooking while waiting for the center to heat through.

Alternate mashed potatoes, turkey, and stuffing in distinct layers rather than mixing them, allowing each component to maintain its texture and create pleasant surprises with every bite.