În a medium size bowl, whisk together the ranch seasoning, Italian dressing mix, brown gravy mix and beef broth until combined and mixes are fully dissolved.
Pour the mixture over the roast in the crock pot.
Cover and cook on low for 8-10 hours or on high for 4-5 hours until the roast shreds easily.
Remove the roast, shred and stir it back into the crock pot.
Whisk together the cornstarch and cold water together in a small bowl.
Stir this mixture into the crock pot. Cover and cook on high for 30 minutes until the sauce thickens.
Serve warm and enjoy!
Notes
You can use a chuck roast instead of a rump roast in this recipe if you prefer. Water can be used instead of the beef broth but I think the broth adds more flavor to the gravy so use broth if you can. Refrigerate the leftovers in an airtight container for up to 5 days.