Twice Baked Potato Casserole

Twice baked potato casserole takes everything you love about loaded twice baked potatoes and puts it in one dish. Russet potatoes baked until fluffy, mashed with butter, sour cream, and sharp cheddar, then topped with more cheese, bacon, and green onions and baked again until golden and bubbly.

We make this when we want the flavor of stuffed potato skins without the fussy scooping-and-restuffing step. One 9x13 dish feeds eight people and comes together in about 20 minutes of hands-on work.

It reheats without losing its creamy center, scales up for holidays, and pairs with almost any protein you already have planned.

Why This Recipe Works

• Baking the potatoes first builds flavor. Dry oven heat concentrates the starch and drives off moisture, which gives the mash a fluffy, almost whipped texture that boiled potatoes never reach.
• Sour cream and butter create the creamy base. The fat from both coats the starch granules, keeping the mash rich and smooth instead of gluey.
• A second bake sets the top. The final 20 to 25 minutes melts the cheese into a bubbly crust and warms the filling through, giving you two distinct textures in the same dish.

Ingredient Notes

A few of these choices affect the texture more than you might expect.

• Russet potatoes: Their high starch content bakes up dry and fluffy, which means they absorb butter and sour cream without turning gluey. Waxy varieties like Yukon Gold will work but produce a denser, less airy casserole.
• Sour cream: Full-fat sour cream gives the best tang and richness. Light sour cream works in a pinch but the filling will be slightly thinner.
• Sharp cheddar: Sharper cheese melts smoothly and adds more flavor per ounce, so you need less to get the same punch. Shred from a block for the cleanest melt since pre-shredded bags contain anti-caking starch.
• Thick-cut bacon: Thicker slices stay chewy after crumbling, which gives the topping textural contrast. Cook them crisp before crumbling since they will not cook further on top of the casserole.

How to Make Twice Baked Potato Casserole

The full recipe is in the card below. Here is the process at a glance.

Step 1: Bake and scoop the potatoes. Bake russet potatoes at 400°F until fork-tender, about 55 to 65 minutes. Halve them and scoop the flesh into a bowl, discarding the skins.

Step 2: Mash and fill the dish. Mash the potato flesh with butter, sour cream, milk, and seasonings, then fold in the cheddar, bacon, and onion whites. Spread the mixture into a greased 9x13 dish.

Step 3: Top and bake. Scatter the remaining cheese, bacon crumbles, and green onion tops over the surface and bake at 375°F for 20 to 25 minutes until bubbly and golden.

Variations

The base is forgiving once the potato-to-dairy ratio stays intact.

• Broccoli cheddar: Fold in 1.5 cups of finely chopped steamed broccoli florets with the cheese. The broccoli adds color and a slight bite that works well with the creamy potatoes, similar to our chicken broccoli casserole but without the protein.
• Ranch and bacon: Replace the garlic powder with 2 tablespoons of dry ranch seasoning mix and double the bacon. Skip the green onions and scatter fried onion strings over the top for crunch.
• Jalapeno popper: Swap half the cheddar for cream cheese (4 oz, cubed and folded in), add 2 diced jalapenos (seeded for mild heat), and top with crushed crackers mixed with melted butter before the second bake.
• Ham and chive: Skip the bacon and fold in 1 cup of diced smoked ham. Replace the green onions with 3 tablespoons of chopped fresh chives for a subtler allium note.

Storage & Reheating

Refrigerate leftovers in an airtight container for up to 3 to 4 days. Reheat individual portions in the microwave for 90 seconds or in a covered dish at 350°F (177°C) for 15 to 20 minutes until heated through.

To freeze, wrap the cooled casserole tightly in plastic wrap and then foil, or transfer portions to freezer-safe containers. It keeps for up to 2 months. Thaw overnight in the fridge and reheat at 350°F covered until the center is hot. The texture holds up well since the potato base is dense and starchy.

To make ahead, assemble the casserole through the filling step, cover, and refrigerate for up to 24 hours before the second bake. Add 5 to 10 extra minutes to the bake time since it is going in cold.

FAQ

Can I use Yukon Gold potatoes instead of russet?

You can, but the result will be denser and creamier rather than fluffy. Yukon Golds have less starch and more moisture, so the filling will not whip up as light. If you prefer a smoother, almost buttery texture, they work well.

Do I need to peel the potatoes before baking?

No. Baking them whole in their skins and scooping after is easier and gives you drier, fluffier flesh. The skins protect the potato from drying out too fast and let the interior steam evenly.

Can I add the toppings before refrigerating overnight?

Yes. Add the cheese, bacon, and onions on top before covering and refrigerating. The cheese will melt and bubble normally during baking, and the bacon stays crisp enough since it is already cooked.

What to Serve With

This casserole is rich and starchy, so lean toward lighter proteins and fresh sides. Grilled chicken, a simple green salad, or roasted broccoli balance it well.

For more potato comfort on the table, check our cheesy hashbrown casserole for a shredded-potato side, or try our tater tot casserole if you want a heartier one-dish meal with ground beef.