Begin by heating 1-2 tablespoons of olive oil or butter in a large skillet over medium-high heat. Once the oil shimmers, add the beef stew meat in batches, ensuring not to overcrowd the pan. Sear the beef tips for 3-4 minutes until crispy and browned on all sides, which enhances the flavor. Transfer the beef to your slow cooker or Instant Pot once browned.

In the same pot, add sliced baby bella mushrooms, chopped onions, and minced garlic. Stir in the seared beef tips to combine. This layering of flavors is vital for a delicious Beef Tips with Mushrooms dish.

Pour in about 1-2 cups of beef broth along with 2 tablespoons of Worcestershire sauce. Season with salt and black pepper to taste. Give everything a gentle stir to ensure all ingredients are coated and combined. This mixture will create a rich, savory gravy.

For slow cooker lovers, cover and cook on LOW for 6-8 hours or HIGH for 4 hours. If using the Instant Pot, seal the lid and pressure cook on high for 35 minutes, followed by a 10-minute natural release. This will tenderize the beef and meld all the flavors beautifully.

Once cooked, mix 2 tablespoons of cornstarch with 2 tablespoons of cold water to create a slurry. Stir this mixture into the pot and set the slow cooker to high for 10 minutes or use the sauté function in the Instant Pot. This will thicken your gravy to a luscious consistency, ideal for serving.

Gently stir your finished Beef Tips with Mushrooms, ensuring everything is coated in that delicious gravy. Serve hot over mashed potatoes, rice, or egg noodles to soak up all those comforting flavors.