Twice Baked Potatoes with Cheddar Filling

When you cut into a russet straight from the oven, the steam escapes before you’ve even reached the filling. I let the potatoes cool just enough to handle, scoop out the centers, then mash them with butter, sour cream, and milk. That second bake turns those simple baked potatoes into sturdy shells filled with soft, savory potato and a layer of melted cheddar.

Using large russets gives you enough potato flesh for a generous filling and shells that can hold it. I keep the potato skins intact, leave some cheddar for the tops, and bake the halves until they’re hot throughout. The scallions bring a fresh, savory bite to the creamy filling, while sharp cheddar keeps the cheese flavor present in every forkful. These twice baked potatoes come out tender in the middle, with a melted-cheese finish.

Twice baked potatoes with melted cheddar

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Kitchen Note

Scoop gently and stop while there’s still a sturdy layer of potato against the skin. Leaving a 1/4-inch-thick shell gives the filling a solid cradle instead of a fragile potato boat.

Save these twice baked potatoes for a cozy dinner side: creamy scallion filling tucked into russet shells under melted sharp cheddar.

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Why the First Bake Has to Finish Before You Scoop

The second trip through the oven is for heating the filling and melting the cheese, not for cooking a firm potato center. If the russets are still underdone when they come out of the first bake, the flesh is harder to scoop and mash, and the filled halves may still feel dense after their shorter return to the oven. A knife should slide easily into the center before you take them out.

That first bake also gives the potato flesh time to soften evenly from skin to center. Russets vary a little in size even when they’re all large, so use the knife test alongside the 50-to-60-minute window rather than judging by the outside alone. Once the centers are tender, the butter, sour cream, and milk can blend into the potato without leaving firm pieces behind. Then the final bake can do its job: warm the filling through and melt the cheddar on top.

What Russets, Sour Cream, and Sharp Cheddar Each Bring

Twice baked potatoes with fluffy filling

Russet potatoes — Their dry, starchy flesh mashes into a light filling, and their thick skins make practical shells. Choose potatoes close in size so they bake at a similar pace; ordinary grocery-store russets work well.
Olive oil — A thin coating goes over the scrubbed, dry skins before baking. A basic olive oil is fine here; its job is to coat the potato, not to carry the flavor of the filling.
Butter — Softened butter blends into the warm potato flesh more easily than a cold, firm piece. Unsalted butter lets the listed kosher salt season the filling without the salt level being harder to control.
Sour cream — It brings tang and a creamy texture that plain milk alone won’t provide. A standard tub from the grocery store is suitable; keep it refrigerated until you’re ready to mash the filling.
Milk — Milk loosens the potato mixture so it can be spooned back into the shells. It works alongside the sour cream rather than replacing its tang, so I keep both in the filling.
Sharp cheddar — Sharp cheddar gives the filling and topping a more pronounced cheese flavor than mild cheddar. A block you shred yourself melts smoothly, while packaged shredded sharp cheddar is convenient and still works.
Scallions — Thin slices distribute through the mashed potato and add a mild onion flavor. Slice them finely so they’re easy to scoop up with the creamy filling.
Kosher salt and black pepper — These season the potato mixture itself, not just the cheese on top. Stir them in with the other filling ingredients so the seasoning is spread through the whole batch.

From Tender Russets to Hot, Cheesy Centers

Bake the Potatoes Until the Centers Give Easily

Heat the oven to 400°F. Scrub the russets, pat them dry, prick each one several times with a fork, and rub the skins with olive oil. Set them on a rimmed baking sheet and bake for 50 to 60 minutes. They’re ready when a knife slides easily into the centers; if it meets resistance, give them more time.

Cool, Split, and Scoop

Let the potatoes cool until they’re easy to handle, about 10 minutes, then slice each one lengthwise. Scoop the flesh into a bowl, keeping the shells intact and about 1/4 inch thick. Work around the potato rather than digging hard into one spot, which helps avoid breaking through the skin. Set the empty shells back on the baking sheet.

Mash the Filling Until Combined

Add the softened butter, sour cream, milk, half of the cheddar, sliced scallions, kosher salt, and black pepper to the potato flesh. Mash until the mixture is combined and the seasonings and scallions are spread through it. You want a cohesive, spoonable filling, not a separate layer of dairy sitting at the bottom of the bowl. If a few small potato pieces remain, that’s fine.

Fill the Shells and Melt the Cheddar

Spoon the mixture back into the potato shells, then top with the remaining cheddar. Bake on the rimmed baking sheet for 15 to 20 minutes, until the filling is hot throughout and the cheese has melted. Look for melted cheese across the tops and heat reaching the middle of the filling, not just the exposed edges. Let the halves stand for 5 minutes before serving.

Small Changes to the Cheddar and Scallion Balance

Make the cheddar topping more prominent

Keep the total cheddar the same, but shift some of the cheese from the filling to the tops. The filling will taste a little less cheesy, while the melted layer on each half will be more noticeable.

Let more scallion flavor sit near the top

Reserve some of the thinly sliced scallions instead of mixing every slice into the potato. Scatter the reserved scallions over the filled shells before adding the cheddar, so they bake beneath the cheese and give the top half of each bite a little more onion flavor.

Keep the ingredient list for a gluten-free table

The ingredients listed here contain no wheat, barley, or rye, so the potatoes don’t need a flour or breadcrumb swap. For someone with celiac disease, use ingredients and kitchen tools that haven’t been exposed to gluten.

Storage and Reheating

Refrigerator: Refrigerate leftovers within 2 hours and keep them covered for 3 to 4 days. The skins soften as the potatoes sit.
Freezer: Freeze cooled halves in an airtight container for up to 1 month for best quality. Thaw overnight in the refrigerator; the filling may be a little grainier after freezing.
Reheating: Warm in a 350°F oven until the center reaches 165°F. Reheating until only the cheese looks hot can leave the middle cool, so check the center of a potato half.

Questions That Come Up When the Potatoes Go Back in the Oven

Can I assemble the potatoes ahead of time?+

Yes. Fill and top the shells, cover them, and refrigerate for up to 24 hours before the final bake. Bake until the centers are hot throughout and the cheddar has melted; starting cold may mean they need more time than freshly assembled potatoes.

Can I use pre-shredded sharp cheddar?+

Yes, pre-shredded sharp cheddar works in both the filling and topping. Shredding a block yourself usually gives a smoother melt, but packaged shreds save prep time and still soften in the oven.

How do I keep the filling from turning gluey?+

Mash the cooked potato with the filling ingredients just until they’re combined. A potato masher gives you control; aggressive blending can overwork the starch and make the texture sticky instead of soft.

Can I use a different kind of potato?+

Russets are the best fit because their starchy centers mash well and their skins hold the filling. Waxy potatoes such as red potatoes tend to make a denser mash, and their thinner skins are less dependable as shells.

Why is the cheese melted while the filling still feels cool?+

The cheese on top can melt before heat reaches the middle, especially if the filled shells started out cold or are unusually large. Put the baking sheet back in the oven and judge by the warmth through the center, not by the cheese alone.