In my opinion mashed potatoes make the ultimate side dish. It basically makes every meal better. You might ask what is the secret to perfect mashed potatoes. The answer is your instant pot or pressure cooker. This Instant Pot Mashed Potatoes Recipe produces potatoes tender and ready to mash after a couple of min. Even if they are not you can close the lid and continue the cooking process for a couple of min more.
Set a wire rack into the bottom of a 6-quart electric pressure cooker. Add the water. Place the potatoes on the rack. Close and lock the lid. Set the cook time for 20 minutes at high pressure.
When the cooking time ends, do not vent the pressure cooker. Allow the pressure to release naturally; this can take about 15 minutes. Once the pressure valve drops, open the lid and transfer the potatoes to a large bowl.
Add the half-and-half or milk and butter. Mash with a potato masher, food mill, or ricer. (Or whip the potatoes with a stand or handheld mixer on low speed with the paddle attachment. Do not use an immersion blender or food processor.) Add the salt, season with pepper if desired, and stir to combine. Taste and add more salt and pepper as needed
To keep the mashed potatoes warm, wash the insert of the pressure cooker to remove cooking starch. Return the insert to the pressure cooker and coat the bottom and sides of the insert with the butter. Add the half-and-half or milk. Spoon in the warm mashed potatoes but don't stir. Cover with a glass lid or pressure cooker lid. If using the pressure cooker lid, be sure to turn the sealing valve to open. Turn on the "keep warm" setting. Gently stir the potatoes every 20 to 30 minutes to prevent them from sticking to the pot.
When ready to serve, spoon into a serving dish and top with chopped chives and a few pats of butter.