Prepare the Crockpot: Add the beef stew meat to the crockpot. Place the cubed stew meat into the bottom of your crockpot, spreading it out evenly to ensure consistent cooking throughout.
Add Seasoning Mixes: Pour the seasoning packets over the meat. Evenly distribute the Au Jus Gravy mix, Lipton Onion Soup mix, and Ranch dressing mix over the stew meat. The combination of these three seasonings will create a deeply flavorful gravy as the meat cooks.
Add Butter: Place the stick of butter on top. Position the stick of butter on top of the seasoned meat. As it cooks, the butter will melt and combine with the seasonings to create a rich, velvety sauce.
Cook: Cover and cook on low for 4-6 hours. Allow the beef tips to cook slowly on the low setting. This slow cooking process ensures the meat becomes tender and fully absorbs the flavors of the seasonings.
Serve: Serve the beef tips over mashed potatoes. Once the cooking time is complete, stir the beef tips in the gravy. Serve hot over freshly made mashed potatoes for a comforting, satisfying meal.