Prepare the BBQ Sauce: In your slow cooker, combine 1 cup of water, 1 cup of ketchup, 1 (6 oz) can of tomato paste, 3/4 cup of brown sugar, 1/2 cup of vinegar, 2 tbsp of prepared mustard, and 1 tbsp of salt. Mix all ingredients until well blended and the sugar dissolves.
Coat the Ribs: Take 2 pounds of beef back ribs and coat them inside the BBQ sauce until they are fully covered. Ensuring a thorough coat will enhance flavors significantly.
Slow Cook: Set your slow cooker on LOW and cook the ribs for approximately 8 hours. You want the beef to become tender and infused with the BBQ goodness.
Serve: Once cooking is complete, serve the beef ribs accompanied by any remaining BBQ sauce. Pair with sides like coleslaw or cornbread to complement the flavors.