Add the potatoes to the pot, and pour the chicken broth over the top.
Place the lid on the Instant Pot and set to high pressure for 8 minutes. Quick release the pressure and drain the potatoes, reserving cooking liquid. Place the potatoes back in Instant Pot bowl and mash with a potato masher.
Add butter, half and half, and salt and pepper, garlic powder and stir to combine.
**Add cooking liquid as needed to reach the desired texture. Serve hot with extra butter and chopped fresh chives.