Peel potatoes and cut into quarters.
Place potatoes and water into Instant Pot.
Season with 1 tsp salt and other seasonings, including minced garlic and dried minced onion.
Close instant pot and set valve to sealing.
Cook potatoes on manual setting for 10 minutes.
When potatoes are finished cooking, do a manual release of pressure.
Keep Instant Pot on keep warm setting.
Open lid and add butter, cream cheese and milk to potatoes.
Mash potatoes with a potato masher, in the Instant Pot, until smooth.
Stir to combined well.
Add salt and black pepper to taste.
Mashed potatoes can stay in the Instant Pot on the keep warm setting for 30 minutes.