Press the saute button on an electric pressure cooker, use the adjust button to set on the “normal” setting.
Add the butter to the pressure cooker, when the display says “hot”, add the onions, saute 4-5 minutes.
Rub the beef chuck roast with the french onion dip mix, then add it to the pressure cooker and sear for 1-2 minutes per side.
Press the Keep Warm/Cancel button on the pressure cooker.
Add the beef broth and worcestershire sauce, stir to combine.
Place the lid on the pressure cooker and make sure the steam release is set to “sealing”.
Press the “manual” button and set the pressure cooker to high pressure, then use the +/- buttons to set the pressure cooker to 60 minutes.
When the cooking time is up, turn off the pressure cooker and wait 15-20 minutes, then release any remaining pressure before unlocking the lid.
Shred the beef with two forks in the pressure cooker and serve with mashed potatoes or your favorite side.
To make in the slow cooker: Add the butter and onions to a large skillet on the stove over medium high heat. Cook for 4-5 minutes. Rub the beef chuck roast with the french onion dip mix, add to the skillet and sear for 1-2 minutes per side. Add the beef and onions to a slow cooker. Pour the beef broth and Worcestershire sauce in the slow cooker. Set to low for 10 hours, or to high for 6 hours.For leftovers: Be sure to store the beef and any liquid from the pot roast for leftovers. You can use the beef to make French Dip Sandwiches or a grilled cheese and serve the liquid au jus on the side for dipping.