Why You’ll Love Sour Cream Mashed Potatoes Recipe
These mashed potatoes strike the perfect balance between rich and comforting without requiring complicated ingredients or techniques. Sour cream adds a subtle tang that complements the buttery potatoes and makes every bite extra flavorful.
They’re also quick enough to prepare for an everyday dinner. The entire recipe takes about 30 minutes and makes six generous servings. Russet potatoes create especially light and fluffy mashed potatoes, while Yukon Gold potatoes offer a naturally creamy, slightly buttery texture.
Another advantage is how easy the recipe is to customize. You can adjust the milk for your preferred consistency, add extra seasonings, or mix in herbs, cheese, or roasted garlic.
Ingredients
(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)
- 8 tablespoons (112g) butter, salted or unsalted
- ¾ cup (180g) sour cream
- 3 pounds russet or Yukon Gold potatoes, peeled and chopped into roughly ½-inch pieces
- 1 tablespoon table salt, plus more as needed
- ½ cup milk, divided
- Pepper, to taste
Directions
- Before preparing the remaining ingredients, cut the butter into approximately 1-inch pieces. Place the butter and measured sour cream in a warm area of the kitchen so they can lose some of their chill while the potatoes cook.
- Put the peeled and chopped potatoes into a large pot. Add enough water to completely cover them, then stir in the salt. Bring the water to a boil before reducing the heat to maintain a steady simmer.
- Cook the potatoes for approximately 10 to 15 minutes, or until completely tender. Test a piece with a fork—it should mash easily against the side of the pot without much resistance.
- During the final few minutes of cooking, heat the milk until steaming hot but not boiling. Warming the milk helps it blend smoothly into the potatoes without cooling them down.
- Drain the cooked potatoes thoroughly and return them to the pot. Add the cubed butter and mash with a potato masher until the butter has melted and the potatoes have reached your preferred texture.
- Stir in ¼ cup of the warm milk followed by all of the sour cream. Mix gently until evenly incorporated.
- Taste the mashed potatoes and gradually add more warm milk if you prefer a softer, creamier consistency. Season with additional salt and pepper as needed.
- Cover the potatoes to keep them warm until serving.
Servings and timing
This recipe makes 6 servings.
Total time: 30 minutes
Cooking time for the potatoes: approximately 10–15 minutes
The remaining time is used for peeling and chopping the potatoes, heating the milk, mashing, seasoning, and serving.
Variations
For garlic sour cream mashed potatoes, mix in roasted garlic or a small amount of finely minced sautéed garlic.
For cheesy mashed potatoes, stir in freshly shredded cheddar, Parmesan, Monterey Jack, or another good melting cheese while the potatoes are still hot.
For an herb version, add chopped fresh chives, parsley, dill, rosemary, or thyme. Chives pair especially well with the sour cream.
For extra-rich potatoes, replace some of the milk with half-and-half or heavy cream.
For loaded mashed potatoes, top the finished dish with shredded cheddar, chopped green onions, additional sour cream, and crispy cooked bacon.
For rustic mashed potatoes, use Yukon Gold potatoes and leave some or all of the skins on before cooking.
Storage/Reheating
Allow leftover mashed potatoes to cool before transferring them to an airtight container. Store them in the refrigerator for up to 3–4 days.
To reheat them on the stovetop, place the potatoes in a saucepan over low heat. Add a small splash of milk and a little butter, then stir occasionally until thoroughly heated.
For microwave reheating, place an individual portion in a microwave-safe dish and add a small amount of milk or butter. Cover loosely and heat in short intervals, stirring between each interval until hot.
If the potatoes become thicker during storage, gradually stirring in warm milk will help restore their creamy consistency.
Mashed potatoes can also be frozen, although their texture may change slightly after thawing. Store them in an airtight freezer-safe container and freeze for up to 1–2 months. Thaw overnight in the refrigerator before reheating.
FAQs
What does sour cream do to mashed potatoes?
Sour cream adds richness, moisture, and a pleasant tangy flavor. It also helps give mashed potatoes a creamy texture while providing more flavor than milk alone.
Are russet or Yukon Gold potatoes better for mashed potatoes?
Both work well, but they produce slightly different results. Russet potatoes are high in starch and create light, fluffy mashed potatoes. Yukon Gold potatoes have a naturally buttery flavor and tend to produce a denser, creamier texture.
Why should the milk be heated before adding it?
Warm milk incorporates more easily into hot potatoes and prevents the potatoes from cooling rapidly. It also makes it easier to achieve a smooth, creamy consistency.
Can I use cold sour cream?
You can, but allowing the sour cream to warm slightly before mixing it into the potatoes is preferable. Very cold ingredients can cool the potatoes and may require additional mixing to incorporate.
How do I keep mashed potatoes from becoming gummy?
Avoid overworking the potatoes. Mash them only until they reach the desired consistency, then gently stir in the remaining ingredients. Blenders and food processors can release too much starch and make mashed potatoes gluey.
Can I make sour cream mashed potatoes ahead of time?
Yes. Prepare them in advance, refrigerate them in an airtight container, and gently reheat before serving. Adding a little milk and butter during reheating can restore their freshly made consistency.
Can I substitute Greek yogurt for sour cream?
Yes. Plain full-fat Greek yogurt can be used as a substitute. It provides a similar tang, although the flavor and texture will be slightly different from traditional sour cream.
How can I make mashed potatoes even creamier?
Use Yukon Gold potatoes, make sure the butter and sour cream aren’t refrigerator-cold, and gradually add warm milk until you reach the desired consistency. A little additional butter or cream can make them even richer.
How do I know when the potatoes are cooked enough?
The potatoes should be very tender. A fork should slide easily into a piece, and you should be able to mash the potato against the side of the pot without significant resistance.
How can I keep mashed potatoes warm before serving?
Keep the finished potatoes covered in the warm pot for a short period. For longer holding times, place them in a covered heat-safe bowl over a pot of gently simmering water or keep them warm in a slow cooker on its lowest setting. Stir occasionally and add a little warm milk if they begin to thicken.
Conclusion
Sour Cream Mashed Potatoes are a simple way to turn classic mashed potatoes into an extra-creamy, flavorful side dish. Butter provides richness, warm milk creates a smooth consistency, and sour cream contributes the subtle tang that makes these potatoes stand out.
Ready in about 30 minutes and serving six, they work just as well alongside an everyday dinner as they do on a holiday table. Serve them freshly mashed and warm, or prepare them ahead and gently reheat them when it’s time to eat.
Sour Cream Mashed Potatoes
Rich and creamy mashed potatoes made with butter, warm milk, and tangy sour cream. A comforting side dish with a smooth, fluffy texture.
- Prep Time: 10 minutes
- Cook Time: 20 minutes
- Total Time: 30 minutes
- Yield: 6 servings
- Category: Side Dish
- Method: Stovetop
- Cuisine: American
- Diet: Vegetarian
Ingredients
- 8 tablespoons (112g) butter (salted or unsalted is fine)
- ¾ cup (180g) sour cream
- 3 pounds russet or Yukon Gold potatoes (peeled and chopped into roughly 1/2-inch pieces)
- 1 tablespoon table salt (plus more as needed)
- ½ cup milk (divided)
- Pepper to taste
Instructions
- Before preparing the other ingredients, cut the butter into 1-inch pieces. Set the butter and measured sour cream in a warm spot in the kitchen to take off the chill.
- Place the potatoes in a large pot and add enough water to completely submerge them. Add the salt and bring to a boil. Reduce the heat to a steady simmer and cook until the potatoes are very tender and can easily be mashed against the side of the pot with a fork, about 10–15 minutes.
- During the last couple minutes of cooking, heat the milk in the microwave until steaming hot but not boiling.
- Drain the potatoes well. Add the cubed butter and mash with a potato masher. Stir in ¼ cup of the warmed milk and all of the sour cream.
- Taste and add more warmed milk as needed to reach your preferred consistency. Season with additional salt and pepper to taste.
- Cover the mashed potatoes to keep them warm until ready to serve.
Notes
- Russet potatoes produce especially fluffy mashed potatoes, while Yukon Gold potatoes give a naturally creamy texture.
- Add the remaining warm milk gradually so the potatoes do not become too thin.
- Keep the finished potatoes covered until serving to help retain their heat and moisture.
Nutrition
- Serving Size: 1 serving
- Calories: 455 kcal
- Sugar: 3 g
- Sodium: 1280 mg
- Fat: 25 g
- Saturated Fat: 16 g
- Unsaturated Fat: 8 g
- Trans Fat: 1 g
- Carbohydrates: 52 g
- Fiber: 4 g
- Protein: 7 g
- Cholesterol: 70 mg
