Wash the potatoes
Peel the potatoes if desired
Cut large potatoes into even pieces
Place a trivet or steamer basket in the Instant Pot
Add 1 cup of water
Put the potatoes in the pot
Close the lid
Set the steam release valve to sealing
Cook on high pressure for 8 to 12 minutes for whole medium potatoes
Cook on high pressure for 4 to 6 minutes for cubed potatoes
Cook on high pressure for 10 to 15 minutes for large whole potatoes
Let the pressure release naturally for 5 minutes
Release any remaining pressure
Open the lid carefully
Check tenderness with a fork
Drain the potatoes if needed
Season or mash as desired