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a bowl of sour cream mashed potatoes with a slice of butter on the top
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Sour Cream Mashed Potatoes

These Sour Cream Mashed Potatoes are lightly tangy and satisfyingly rich. They’re a fantastic option for making decadent and creamy mashed potatoes without using heavy cream. 
Course Side
Cuisine American
Prep Time 10 minutes
Cook Time 20 minutes
Total Time 30 minutes
Servings 6 to 8 servings
Calories 322kcal
Author Tracy

Equipment

  • 1 Large pot
  • 1 Potato masher
  • 1 Microwave-safe measuring cup, or microwave-safe dish to heat milk in

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 any of your other ingredients, cut butter into 1-inch pieces and set both the butter and your measured-out sour cream in a warm spot in your kitchen.
  • Place the cut potatoes in a large pot and add water until the potatoes are completely submerged. Add salt and bring the pot to a boil and then reduce heat and bring the water down to a good simmer. Cook until the potatoes are tender—you should be able to easily mash a piece against the side of the pot with a fork, about 10-15 minutes.
  • In the last couple minutes of cooking time for the potatoes, heat all of the milk in the microwave until it is steaming hot but not boiling.
  • Drain the potatoes, add the cubed butter, and use a potato masher to mash the potatoes*. Stir in ¼ cup of the warmed milk and all of the sour cream.
  • Taste and add more warmed milk, salt, and pepper as needed.
  • To keep them warm, cover the potatoes until you’re ready to serve them. Enjoy!

Notes

*If using a mill or ricer, process the cooked potatoes first and then stir in the butter.
Approximate nutritional information is for 7 servings.

Nutrition

Calories: 322kcal