Start by peeling the russet potatoes and cutting them into 4 large pieces. Place the potato chunks into the Instant Pot. Add 1/2 cup of water and sprinkle 2 teaspoons of kosher salt over the potatoes.
3 pounds Russet Potatoes, ½ cup Water, 2 teaspoon Kosher Salt
Secure the lid on the Instant Pot, making sure the valve is set to the sealing position. Select the manual setting and set the timer for 11 minutes on high pressure.
Once the cooking time is up, carefully perform a quick release by turning the valve to the venting position. When the pressure has fully released, open the lid.
Add the Boursin cheese, milk, and sour cream. Using a potato masher or an electric mixer to mash the potatoes until they reach your desired consistency. For a smother texture, you can use an immersion blender.
¼ cup Butter, 5 ounce Boursin Cheese, ⅓ cup Milk, ½ cup Sour Cream
Serve immediately, garnished with a sprinkle of fresh herbs or an extra pat of butter if desired.
Serve immediately.
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