Longhorn Mashed Potatoes Recipe

Longhorn-style mashed potatoes are a creamy, buttery steakhouse side made with tender potatoes, garlic, Parmesan, and a little sour cream for a gentle tang. This home version is rich without being complicated, and you can adjust the texture from fluffy to softly rustic depending on how you mash it.

Ingredients

3 lb (1.36 kg) russet potatoes, peeled and cut into 1½-inch (4 cm) pieces
8 cups (1.9 L) cold water, or enough to cover the potatoes by about 1 inch (2.5 cm)
1½ tsp (9 g) kosher salt for the cooking water, plus more to taste
6 tbsp (85 g) unsalted butter, cut into pieces
¾ cup (180 ml) heavy cream
½ cup (120 g) sour cream
3 garlic cloves (about 9 g), finely minced or pressed
¾ cup (60 g) finely grated Parmesan cheese
½ tsp (1 g) freshly ground black pepper, plus more to taste
1 tbsp (3 g) finely chopped chives, optional, for serving

Instructions

Prepare the potatoes. Peel the potatoes and cut them into pieces of similar size so they cook evenly. Put them in a large pot and add the cold water and 1½ teaspoons kosher salt. Starting the potatoes in cold, salted water helps the outsides and centers become tender at roughly the same time.
Simmer until tender. Set the pot over high heat and bring the water to a boil. Reduce the heat to maintain a steady simmer and cook for about 18 minutes. Test a larger piece with a fork or paring knife: it should slide through easily, and the potato should break apart with gentle pressure. If the center still feels firm, simmer for another 2 to 3 minutes and check again.
Warm the dairy and garlic. During the last few minutes of cooking, put the butter, heavy cream, and minced garlic in a small saucepan. Warm over low heat for about 3 minutes, stirring once or twice, until the butter has melted and the mixture is steaming but not boiling. Take it off the heat and stir in the sour cream. Warming the cream mixture helps it blend smoothly into the hot potatoes; boiling it can cause unnecessary splattering and may make the dairy separate.
Drain and dry the potatoes. Drain the cooked potatoes thoroughly in a colander, then return them to the hot pot. Let them stand for about 2 minutes, uncovered, so excess surface moisture can evaporate. This short pause helps keep the finished mash rich rather than watery.
Mash and season. Mash the potatoes with a hand masher or potato ricer. Pour in most of the warm butter-and-cream mixture and fold or mash until incorporated. Add the Parmesan and black pepper, then mix just until the cheese melts into the potatoes. Taste before adding more salt, since Parmesan and the salted cooking water both contribute seasoning. Add the remaining cream mixture a little at a time if you want a softer consistency.
Finish and serve. Spoon the potatoes into a warm serving bowl. If desired, add a small pat of butter and sprinkle with chives and a little extra Parmesan. Serve while hot, when the butter is glossy and the potatoes are at their creamiest.

Tips

Choose the right potato. Russets produce a fluffy, light mash because they are starchy and break down easily. Yukon Gold potatoes also work; they make a naturally creamier, slightly buttery mash that is usually less fluffy. If using Yukon Golds, you can leave some or all of the thin skins on for a more rustic texture.
Keep the pieces even. Large uneven chunks can leave you with a mix of overcooked edges and firm centers. Cut the potatoes into pieces close to the same size, and begin them in cold water rather than adding them to already boiling water.
Mash gently. A hand masher gives you more control over the texture, while a ricer makes a particularly smooth result. Avoid a blender or food processor: high-speed blades can release too much starch and turn the potatoes gluey. Once the dairy and cheese are added, mix only until everything comes together.
Adjust the dairy to the potatoes. Potato varieties and even individual batches vary in how much liquid they absorb. Add the warm cream mixture gradually, stopping when the mash is as soft as you like. For a lighter result, replace some heavy cream with whole milk; it will be less rich but still smooth.

Serving Suggestions

Serve these potatoes hot alongside steak, roast chicken, pork chops, meatloaf, or grilled vegetables. Their buttery texture and savory Parmesan flavor pair especially well with simply seasoned mains, and the garlic makes them substantial enough to feel at home on a holiday or Sunday dinner table. For a classic plate, add a green vegetable such as roasted broccoli, green beans, or a crisp salad to balance the richness.

They also make a useful base for gravy or pan juices. If you plan to pour gravy over the top, keep the potatoes slightly thicker rather than loosening the whole batch with extra cream; the sauce will add moisture at the table. For individual servings, use a warm spoon and finish each portion with chives, cracked pepper, or a little extra Parmesan. Set out additional butter separately so guests can choose how rich they want their portion.

Variations

More pronounced garlic: Increase the garlic to 4 cloves (about 12 g) and warm it gently in the butter and cream as directed. For a mellow, sweet garlic flavor, use 1 small roasted garlic bulb (about 30 g of squeezed-out cloves) instead of the minced raw garlic. Roasted garlic is softer and less sharp, so the finished potatoes taste sweeter and less pungent.

Extra cheesy: Increase the finely grated Parmesan to 1 cup (80 g), or replace up to ¼ cup (20 g) of it with finely grated sharp cheddar. Parmesan gives a salty, nutty taste; cheddar makes the potatoes more familiar and tangy. Add cheese a little at a time and taste before salting further.

Herb finish: Stir in 1 tablespoon (3 g) chopped chives or 1 tablespoon (4 g) chopped parsley at the end. Chives keep the flavor mild and onion-like, while parsley adds a fresh, grassy note. Avoid adding a large amount of fresh herbs during mashing, since their color and flavor can become muted in the hot potatoes.

Make it a little lighter: Replace half of the heavy cream with whole milk, or use plain Greek yogurt in place of the sour cream. Milk makes the mash less rich and a touch thinner; Greek yogurt gives it a brighter tang and a thicker texture. Add either substitute gradually so you can stop when the consistency is right.

Storage and Reheating

Transfer leftover potatoes to a shallow, airtight container and refrigerate within 2 hours of cooking. They keep for 3 to 4 days in the refrigerator. The potatoes will firm up as they chill, so that change in texture is normal. For the best quality, store any extra toppings separately and add fresh chives or Parmesan after reheating.

To reheat a single serving, put it in a microwave-safe bowl with 1 to 2 teaspoons (5 to 10 ml) of milk or cream. Cover loosely and heat in short bursts, stirring between them, until steaming throughout. For a larger amount, reheat in a covered saucepan over low heat, stirring often and adding milk or cream a spoonful at a time. You can also warm the potatoes in a covered oven-safe dish at 325°F (163°C), stirring once or twice; allow extra time for a large, cold batch. Reheat leftovers to 165°F (74°C), checking the center with a food thermometer, as USDA FSIS recommends. Avoid repeatedly cooling and reheating the same batch.

Freezing is possible, though the texture may be slightly grainier after thawing because potatoes and dairy can separate. If you freeze them, use a freezer-safe airtight container and thaw overnight in the refrigerator. Reheat gently with a little extra milk or cream, stirring until smooth and hot throughout. Do not leave cooked potatoes at room temperature for extended storage.

Frequently Asked Questions

Are these the exact Longhorn Steakhouse potatoes?
This is a home-cookable, steakhouse-inspired version with garlic, butter, cream, sour cream, and Parmesan. Restaurant recipes can vary, and this recipe is not presented as an official or exact restaurant formula. Adjust the cheese, garlic, and texture to suit the meal you are serving.

Do I have to peel the potatoes?
No. Russet skins are relatively thick, so peeling them gives the smoothest, fluffiest result. You can leave the skins on Yukon Gold potatoes, or peel only some of them for a rustic mash. Scrub unpeeled potatoes well before cutting, and expect the texture to be more substantial.

Can I make mashed potatoes ahead of time?
Yes. Make them up to a day ahead, cool and refrigerate them promptly, then reheat gently with a splash of milk or cream. If you are preparing them for guests, leave the final garnish until just before serving. The potatoes thicken as they chill, so loosen them gradually during reheating rather than adding a large amount of liquid at once.

Why did my potatoes turn gummy?
Overworking potatoes is the most common cause. A blender or food processor breaks down too much of their starch, and vigorous mixing after adding dairy can also make them sticky. Use a hand masher or ricer, drain the potatoes well, and mix only until the butter, cream, and cheese are incorporated.

What if my mashed potatoes are too thick or too loose?
If they are too thick, stir in warm milk or cream a tablespoon at a time until they soften. If they are too loose, let them sit uncovered for a few minutes so steam can escape, then fold gently. Avoid trying to fix loose potatoes by beating them hard, since that can make their texture gummy.

Can I double this recipe?
Yes. Double each ingredient and use a pot large enough to keep the potatoes covered by water. The water may take longer to return to a boil, and a large batch can take a few extra minutes to become tender, so use the fork test rather than relying only on the clock. Mash in batches if needed, then combine gently with the dairy and cheese.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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