Arrange Short Ribs:
Arrange the short ribs flat on the bottom of the slow cooker so they are submerged during cooking.Mix Soup Blend:
Combine the cream of mushroom soup, dry onion soup mix, and beef broth in a bowl; stir until homogeneous.Pour Over Meat:
Pour the soup blend over the meat, ensuring complete coverage; spread with a spoon if necessary.Cook Until Tender:
Cook covered on LOW for 7 to 8 hours or on HIGH for 4 to 5 hours, until the beef is fork-tender and pulls apart easily.Check and Defat Sauce:
Once cooked, check the sauce for salt; the onion soup mix may provide enough, so season only if needed. Remove surface fat with a spoon.Shred and Coat Beef:
Shred the beef with two forks into desired size pieces. Toss the shredded meat back into the sauce to coat thoroughly.Serve Over Starch:
Serve the beef and sauce hot atop mashed potatoes, rice, or noodles, with additional sauce ladled over.