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These buttermilk baked potatoes are warm, simple, and creamy with tangy buttermilk and bronzed, lightly crisp skins. With just potatoes, buttermilk, and butter, they bake into an easy side dish that feels special without any fuss. You’re going to love how the buttermilk thickens into a rich, tangy cream around the potatoes.
Why You’ll Love It
- Three main ingredients — potatoes, buttermilk, and butter are all it takes.
- Mostly hands-off — the Oven does nearly all the work.
- Creamy with crisp edges — tender centers, bronzed skins, and thickened tangy buttermilk.
- Goes with nearly anything — perfect alongside roast Chicken, meatloaf, ham, or pork chops.
Ingredient Notes
Use small to medium russet or Yukon Gold potatoes. Russets give you that fluffy, classic baked-potato middle, while Yukon Golds have a naturally buttery texture.
Full-fat buttermilk is important here. This is not the moment for skim anything, bless it. Shake the carton well before pouring—it settles, and you want all that tangy goodness mixed back together.
For butter, use unsalted so the salt can be adjusted at the end. If all you have is salted butter, there’s no need to run to the store. Just go easy on the optional kosher salt. Nobody needs a side dish that tastes like the Atlantic.
Ingredients
- 2 pounds small to medium russet or Yukon Gold potatoes, scrubbed well and dried completely
- 2 cups full-fat buttermilk, shaken up first—give that carton a good rattle
- 4 tablespoons unsalted butter, cut into little pieces
- 1 teaspoon kosher salt, optional, or less if you’re cautious about it
- 1/2 teaspoon freshly ground black pepper, optional, though I almost always use it
Instructions
Heat your oven to 375°F. Lightly butter or spray a 9×13-inch glass Casserole dish. Buttering works well here because there’s already butter out and it saves washing one more thing than necessary. A glass dish is nice here because you can peek at the creamy buttermilk around the edges without opening the oven every five minutes.
Scrub the potatoes very well and dry them thoroughly. Leave the skins on. That’s where some of the best texture happens. If any potato is larger than a small fist, cut it in half lengthwise. Don’t skip that part. Large potatoes take forever, and then you’ll have one tender potato and three little rocks floating in dairy.
Arrange the potatoes in one layer in the prepared Casserole dish. If you halved any, place them cut-side down. Keep them nestled together fairly snugly, but don’t stack them. Think sleeping puppies, not a junk drawer.
Pour the buttermilk evenly over the potatoes. You want it to come about halfway to three-quarters of the way up their sides—not fully cover them. Depending on the shape of your potatoes and dish, you may need a smidge more or less than the full 2 cups to get that level right. This is cooking, not a geometry exam.
Dot the potatoes with the butter pieces, spreading them around so everybody gets some. Sprinkle with the kosher salt and black pepper if you’re using them. Seasonings are like earrings: technically extra, but sometimes they help.
Cover the dish tightly with foil and bake for 45 to 55 minutes, until the potatoes are just tender when pierced with a fork. The buttermilk may look separated and thickened when you check it. Don’t panic. It looks a little odd, I’ll admit—a bit like it has lost its way—but that is exactly what should be happening.
Carefully remove the foil. Spoon some of that thickened buttermilk from the bottom of the dish over the tops of the potatoes. Then put the dish back in the oven, uncovered, for 25 to 35 minutes. This is when the skins and tops turn golden and lightly crisp, while the centers finish getting soft and fluffy.
Let the potatoes rest for 5 to 10 minutes after they come out. The creamy buttermilk sauce settles down a little during that time, and you won’t burn the roof of your mouth trying to “just taste one.” Serve them hot with plenty of the cream spooned over each portion. Crusty bread on the table is not required, but it is a darn good idea.
Variations
If you like an extra-crispy skin, prick the potatoes a few times with a fork and rub them lightly with a bit of the butter before putting them in the dish. Add a dramatic amount of black pepper for “restaurant energy.”
For a richer version, replace 1/2 cup of the buttermilk with heavy cream, keeping the rest of the buttermilk in place.
You can also peel the potatoes if a fully soft and creamy texture is preferred. The skins add texture, but the potatoes are still delicious without them.
One variation that did not work: slicing the potatoes thin to speed things up. It turned into something halfway between scalloped potatoes and a dairy swamp. Edible, yes. Lovely, no. Leave them whole or halved.
Storage & Reheating
If you have leftovers—and that’s a bigger “if” than you might think—cover the casserole dish with foil and refrigerate it. They’ll keep well for a few days.
To reheat, cover the dish again with foil and warm it in a 325°F oven until heated through. Reheating time will vary depending on the amount left in the dish.
The really good leftover move is to mash the potatoes right into that thickened buttermilk cream. It makes an easy, tangy mashed potato side that’s especially good with leftover meatloaf. Or eat it standing at the counter in your bathrobe while the coffee brews. I’m not here to judge.
Final Notes
There are recipes that impress, and then there are recipes that comfort. These are comforting potatoes.
They suit damp evenings when the windows fog up from cooking and boots sit in a heap by the back door. The creamy buttermilk gets spooned over the potatoes, and dinner comes together out of three ordinary things.
That’s the part worth coming back to—the ordinary things. A bag of potatoes. Buttermilk. Butter. A little patience.
Still. On a wet night, with the oven on and those potatoes browning away, the house feels a little less restless. And sometimes that’s plenty.
Oven Baked 3-Ingredients Buttermilk Baked Potatoes
Ingredients
- 2 pounds small to medium russet or Yukon Gold potatoes scrubbed well and dried completely; halve lengthwise if larger than a small fist
- 2 cups full-fat buttermilk shaken well before pouring; use enough to come halfway to three-quarters up the potatoes
- 4 tablespoons unsalted butter cut into little pieces, plus more for the dish if buttering
- 1 teaspoon kosher salt optional; use less if using salted butter or if cautious about salt
- 1/2 teaspoon freshly ground black pepper optional
Instructions
- Heat the oven to 375°F and lightly butter or spray a 9x13-inch glass casserole dish.
- Scrub the potatoes very well, dry them thoroughly, and leave the skins on; if any potato is larger than a small fist, cut it in half lengthwise.
- Arrange the potatoes in one layer in the prepared casserole dish, placing any halved potatoes cut-side down and keeping them nestled snugly without stacking.
- Pour the buttermilk evenly over the potatoes so it comes about halfway to three-quarters of the way up their sides, using a little more or less than 2 cups as needed.
- Dot the potatoes with the butter pieces, spreading them around evenly, then sprinkle with kosher salt and black pepper if using.
- Cover the dish tightly with foil and bake for 45 to 55 minutes, until the potatoes are just tender when pierced with a fork; the buttermilk may look separated and thickened.
- Carefully remove the foil, spoon some of the thickened buttermilk from the bottom of the dish over the tops of the potatoes, and return the dish to the oven uncovered for 25 to 35 minutes, until the skins and tops are golden and lightly crisp and the centers are soft.
- Let the potatoes rest for 5 to 10 minutes after baking, then serve hot with plenty of the creamy buttermilk spooned over each portion.