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Instant Pot Mashed Red Potatoes

Buttery garlic mashed red poatoes cooked and mashed right in the Instant Pot.

Course Dinner
Cuisine American
Prep Time 5 minutes
Cook Time 20 minutes
Natural Pressure Release 15 minutes
Total Time 1 hour
Servings 6
Calories 517 kcal


  • 5 pounds red potatoes
  • 1 1/2 cups water
  • 8 tablespoon butter
  • 2 cloves garlic smashed
  • 1 1/2 cups half and half warmed
  • 1/2 cup sour cream
  • 2 teaspoons kosher salt
  • 1/2 teaspoon freshly ground black pepper
  • 1/4 cup green onion diced


  1. Start by scrubbing 5 pounds of red potatoes well and piercing the skin a few times on each potato with a fork. Then place potatoes on a steamer rack in a 6QT Instant Pot and add 1 1/2 cups of water to the potatoes.


  2. Cook on High Pressure for 20 minutes, then let Instant Pot Natural Pressure Release. While potatoes are cooking, melt butter in a small pan on the stove with two whole garlic cloves to infuse butter with garlic flavor. Let sit until potatoes are ready to mash. Garlic will continue to flavor the butter as it sits.

  3. Use cooking tongs to carefully remove hot potatoes. Remove steaming rack and discard any leftover cooking water. Return poatoes to Instant Pot and mash with garlic butter, discarding whole garlic pieces. Then stir in warm half and half followed by sour cream, kosher salt, freshly ground black pepper and green onions.

Recipe Notes

A metal potato masher will cause some scarring in the stainless steel Instant Pot liner. Use a nylon masher or transfer potatoes to a separate bowl for mashing to avoid scratches.  

Nutrition Facts
Instant Pot Mashed Red Potatoes
Amount Per Serving
Calories 517 Calories from Fat 234
% Daily Value*
Fat 26g40%
Saturated Fat 16g100%
Cholesterol 72mg24%
Sodium 1021mg44%
Potassium 1837mg52%
Carbohydrates 64g21%
Fiber 7g29%
Sugar 6g7%
Protein 10g20%
Vitamin A 870IU17%
Vitamin C 34.3mg42%
Calcium 134mg13%
Iron 2.9mg16%
* Percent Daily Values are based on a 2000 calorie diet.