Sous Vide Mashed Potatoes

This recipe for basic mashed potatoes uses your sous vide immersion cooker. While it does take longer than traditional boiled potatoes, the potato flavor is much more concentrated because you aren't boiling away the flavor in water. The added flavor is well worth the time, plus you free up space on the stove for other things!

Prep Time:
15 mins
Cook Time:
1 hr 30 mins
Total Time:
1 hr 45 mins
4 servings


  • 1 ½ pounds russet potatoes

  • ½ cup cold salted butter, cubed

  • ½ cup half-and-half, or as needed

  • cup sour cream

  • salt and freshly ground black pepper to taste


  1. Fill a large pot with water and place a sous vide immersion cooker into the water. Set temperature to 195 degrees F (91 degrees C) according to manufacturer's instructions.

  2. Peel potatoes and cut into cubes, no bigger than 3/4 inch. Place potatoes in a single layer inside a large vacuum bag, along with cubed butter, 1/2 cup half-and-half, and sour cream. Ensure potatoes are spread out as much as possible. Seal the bag using a vacuum sealer, stopping the sealer early so liquid doesn't escape from the bag.

  3. Place bag into the water and set timer for 90 minutes. Some air may remain in the bag, and you will need to weigh the bag down with a heavy object to ensure bag is fully submerged. After 45 minutes, remove bag and redistribute potatoes evenly in bag, if needed.

  4. When timer is up, cut bag open and dump contents into a large bowl. Season with salt and pepper and mash potatoes. Add in additional half-and-half, if needed.

Cook's Notes:

Feel free to add different seasonings to the bag to suit your tastes. I like to use truffle or garlic butter instead of plain.

To make vacuum sealing liquids easier, you can freeze half-and-half and sour cream in ice cube trays ahead of time.

If you do not have a vacuum sealer, you may use a large plastic resealable bag. To use the water displacement method to seal a plastic resealable bag, slowly lower the bag into the water, letting the water pressure force the air out of the bag, then seal closed. Halfway through cooking, move potatoes around in the bag so they cook evenly.

Nutrition Facts (per serving)

415 Calories
31g Fat
32g Carbs
5g Protein
Nutrition Facts
Servings Per Recipe 4
Calories 415
% Daily Value *
Total Fat 31g 39%
Saturated Fat 19g 97%
Cholesterol 81mg 27%
Sodium 196mg 9%
Total Carbohydrate 32g 12%
Dietary Fiber 4g 13%
Total Sugars 1g
Protein 5g
Vitamin C 34mg 170%
Calcium 81mg 6%
Iron 1mg 8%
Potassium 791mg 17%

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

** Nutrient information is not available for all ingredients. Amount is based on available nutrient data.

(-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.

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