Peel and rinse sweet potatoes.
Add 1 cup water into the base of your Instant Pot, then add the steam rack and put all the sweet potatoes into the insert.
Set to Sealing.
Pressure cook on High for 15 minutes.
Let naturally release.
Open Instant Pot and strain off the liquid and remove the rack.
Mash the sweet potatoes in the insert, add butter, cinnamon and salt. If you wish to add a sweetener, you can
You could also transfer to baking dish, top with marshmallows and bake into Sweet Potato Casserole.
Serve Mashed Sweet Potatoes as side dish for holiday meal, or weeknight dinner.