Cut beef tips into bite-sized pieces and season with salt and pepper.

In your slow cooker, combine brown gravy mix and onion soup mix with water or beef broth. Stir until smooth.

Add the prepared beef tips to the gravy mixture and stir gently to coat.

Cover and cook on low for 7-8 hours until tender.

To thicken the gravy, mix cornstarch with a little water, stir into the slow cooker, and cook for an additional 10-15 minutes.

Let the dish rest for 10 minutes before serving over mashed potatoes or egg noodles.