After the meat is removed from the pan, carefully drain out any excess oil. Add the stock to the pot, stirring and scraping the bottom of the pan of the stuck on brown bits. Those bits are called fond and are full of flavor and will help enhance the sauce.
¼ Cup stock
Pour the deglaze liquid over the meat in the slow cooker.
Sprinkle the au jus and ranch packets over the beef and add the pepperoncinis and the juice from the jar of the pepperoncinis, and top with butter.
1 packet Hidden Valley Ranch Dressing Packet, 1 packet Au Jus, 8 individual Pepperoncini, ¼ Cup Pepperoncini liquid, 1 stick Butter
Close the lid and cook on low for 8-12 hours or high for 4-6 hours.