Prepare the Beef:
Season the beef tips with salt and pepper.
Toss the seasoned beef in flour to coat evenly.
Sear the Beef:
In a large skillet over medium-high heat, melt the butter.
Add the beef tips in batches, searing on all sides until browned and crusty. Remove to a plate and set aside.
Cook the Onions:
In the same skillet, add the diced onions and cook briefly for about 2 minutes, scraping up any browned bits from the bottom of the pan with a wooden spoon.
Slow Cooker Method:
Transfer to Slow Cooker:
Transfer the seared beef and onions to the slow cooker.
Add mushrooms, garlic powder, onion powder, dried thyme, rosemary, bouillon cube, Worcestershire sauce, bay leaf, pepperoncinis, and 2 cups of beef stock.
Cook:
Cover and cook on high for 3-4 hours or on low for 6-7 hours.
Thicken the Gravy:
30 minutes before cooking time is up, whisk the cornstarch into 3 tablespoons of water and stir into the slow cooker.
Cover and continue cooking for the remaining 30 minutes.
Season to taste with salt and pepper before serving.
Instant Pot Method:
ADVERTISEMENT
