This method gives you slow-cooked flavor in a fraction of the time.
Set the Instant Pot to Sauté and add oil or tallow.
Lightly season the beef roast with salt and pepper.
Sear the roast on all sides until deeply browned, then turn off sauté.
Remove the roast from the pot and place in a medium bowl or on roasting pan.
Pour in some of the beef broth and scrap the browned bits from the bottom of the pot.
Add remaining beef broth, the Worcestershire sauce., the onion soup mix and garlic powder.
Add the roast back to the Instant Pot.
Lock the lid and cook on High Pressure for 70 minutes.
Allow a 15–20 minute natural release, then vent remaining pressure.
Remove the roast and shred with forks, or cut into thin slices.
Turn Instant Pot back to Sauté and simmer the au jus for 5–10 minutes to concentrate flavor.
Return shredded beef to the pot and keep warm until serving.