Favorite Mashed Potato Casserole

This is the make-ahead mashed potato trick that turns Thanksgiving from a stovetop juggling act into a relaxed afternoon. Mash, mix, cover, refrigerate overnight, then bake the next day. Your range stays free for turkey and gravy while the potatoes warm through in the oven.

Cream cheese is the secret weapon. Eight ounces folded into mashed potatoes alongside sour cream creates a casserole with the kind of luxurious, almost cheesecake-rich texture that plain mashed potatoes cannot match. The cream cheese also helps the casserole hold its structure through the make-ahead chill and the reheat.

The 24-hour rest is what transforms this from “reheated leftovers” into something that tastes intentional. The flavors meld, the texture firms up, and a slow oven bake the next day creates a slightly crusty, browned top while the interior stays creamy and warm.

A brush of melted butter and a sprinkle of paprika just before baking is what elevates this presentation. The paprika gives that classic warm-orange color and the melted butter helps form the lightly crisped surface during baking.

Pro Tips

• Use Russet or Yukon Gold potatoes, both have the right starch content for fluffy mashing. Waxy potatoes turn gluey when mashed.
• Bring cream cheese fully to room temperature before mixing in. Cold cream cheese leaves visible white lumps that won’t smooth out.
• Cover the casserole tightly with foil during refrigeration to prevent the top from drying out and forming a leathery skin.
• Let the chilled casserole sit at room temperature for 30 minutes before baking, this prevents the cold center from staying cool while the edges overheat.

Variations

• Stir 1 cup of grated sharp cheddar cheese into the mashed potatoes for a cheesier version.
• Top with crumbled cooked bacon and chopped chives just before serving for a loaded baked potato vibe.
• Substitute Greek yogurt for sour cream for a tangier, slightly lighter casserole.