Add all of the ingredients to your slow cooker except for the beef roast and pepperoncinis. Stir to combine.
Add the beef roast and spoon some sauce on top. Add pepperoncinis to the slow cooker and pour a splash (1-2 tablespoons) of pepperoncini juice over the meat.
Cook in your slow cooker on low heat setting for 7-8 hours until meat is fork tender.
Serve over mashed potatoes or on toasty buns for a delicious sandwich and more!
Notes
HOW TO MAKE POT ROAST IN THE INSTANT POT/PRESSURE COOKER:Cook on “high” or “manual” mode for 1 ½ hours. Let pressure release naturally when done (about 15 minutes).
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