Prep the Ingredients. Start by dicing the onion and mincing the garlic. This step ensures that all the flavors meld beautifully during the slow cooking process.
Sear the Beef Tips. (Optional, but recommended) In a hot skillet, sear the beef tips on all sides until browned. This adds depth of flavor to the beef and the gravy.
Add Ingredients to the Slow Cooker. Place the seared beef tips, onion, garlic, beef broth, Worcestershire sauce, soy sauce, thyme, and bay leaf into the slow cooker. Stir to combine.
Cook Low and Slow. Cover and cook on low for 6-8 hours or on high for 3-4 hours, until the beef is tender and the flavors have melded together.
Thicken the Gravy. In the last 30 minutes of cooking, make a slurry by mixing cornstarch with a bit of water. Stir it into the slow cooker to thicken the gravy.
Serve and Enjoy. Serve the beef tips and gravy over mashed potatoes or rice for a complete, comforting meal.