Wash potatoes and dry well.
Chop parsley and set aside.
Place trivet in bottom of Instant Pot or other electric pressure cooker.
Add 1 cup of water or broth to the bottom of pressure cooker.
Place potatoes on top of trivet.
Place the lid on the pressure cooker and turn the valve to the seal position.
Cook on high pressure for 6 minutes and release pressure when done cooking.
Remove potatoes and dump out the pressure cooker liner.
Return liner to pressure cooker and turn to sauté mode.
When screen reads “HOT” add butter and olive oil to pot until melted.
Add salt, pepper, garlic, rosemary and potatoes and sauté 3- 4 minutes turning halfway through.
Press cancel on the pressure cooker to turn off the heat.
Add the chopped parsley and toss.
Remove potatoes to large bowl and pour butter mixture over potatoes and serve.