Peel and cut the potatoes into large chunks. I like to cut each potato into 12-16 chunks.

Add the potatoes and 1 cup of water to the Instant Pot. Set the pressure to high and cook for 6 minutes; then naturally release the pressure for 10 more minutes.

Release the pressure the rest of the way, remove the lid, and drain any excess water.

Mash the potatoes in the bowl of the instant pot (use plastic if possible!) until mostly smooth. Add the remaining ingredients and stir to combine. Taste and add more salt if needed.