Peel the potatoes and dice into approximatly 1 inch cubes.
Place the potatoes into the instant pot and add 1 cup water.
Close the lid, turn the valve to seal and set to high pressure for 8 minutes.
When the timer is complete, turn the valve to quick release the pressure. When the pin drops carefully remove the lid, drain the potatoes and return them to the pot.
Add the remaining ingredients to the pot and, using a potato masher, mash the potatoes until they are smooth and creamy.
Transfer to a serving bowl and serve. If desired drizzle with melted butter and sprinkle with fresh parsley, chives or green onion.
Notes
Yellow potatoes can be used in place of russet, or you can use a blend of the two.Butter can be replaced with margarine, milk or chicken broth.