The biggest mistake with slow cooker beef short ribs is skipping the fat trim. Leave that thick cap on, and the sauce turns greasy instead of clinging to the meat. Boneless ribs have plenty of marbling to keep them moist through the long cook, so trimming the surface fat gives you a rich, glossy gravy that coats every strand.
With just canned soup, onion soup mix, and broth, this comes together in minutes and delivers the kind of fall-apart tenderness that makes short ribs a standout main. No searing, no stirring, no last-minute thickening, the slow cooker does all the work.
The first time I made this, I skipped trimming the fat and ended up with a greasy, watery sauce that wouldn’t coat the meat.
Cream of Mushroom and Onion Soup Mix
The canned soup gives you a ready-made umami base with plenty of body, so the sauce turns out thick without reducing. Dry onion soup mix delivers concentrated onion flavor and a good hit of salt, which seasons the meat throughout the long cook. Together they create a gravy that clings to the short ribs.
No extra thickening or simmering needed, it’s a shortcut that actually works.
Prepping Boneless Short Ribs
Boneless short ribs have enough marbling to keep the meat moist as collagen slowly renders. But that excess fat layer on top? Now I always trim it off before cooking, and the sauce stays rich and clings to the meat instead of turning greasy.
Arrange the pieces flat on the bottom of the slow cooker so each one sits in the liquid. That even contact ensures they cook uniformly and stay submerged.
Why Low and Slow Wins
Cooking on LOW for 7 to 8 hours gives collagen time to break down gradually, leaving the beef fork-tender and easy to pull apart. You’ll know it’s done when a fork slides in with little resistance and the meat separates into strands. You can cook on HIGH for 4 to 5 hours if you’re short on time, but the texture won’t be quite as silky.
Low heat delivers the most consistent, shreddable result.
Prep: 10 min · Cook: 8 hr · Total: 8 hr 10 min · Servings: 6
Ingredient Notes for Short Ribs
Boneless beef short ribs: Buy ribs with good marbling; trim the thick fat cap so the sauce stays rich, not greasy.
Cream of mushroom soup: Use the canned condensed soup; it gives body and umami without needing to reduce or thicken.
Dry onion soup mix: One packet (1 oz) provides concentrated onion flavor and salt that seasons the meat throughout cooking.
Low-sodium beef broth: Low-sodium keeps the final sauce from being too salty since the soup mix adds plenty.
Building the Gravy Base
Mix the sauce
Stir the cream of mushroom soup, onion soup mix, and broth until smooth. The mixture will look thick and pale, that’s fine, it’ll thin as the meat releases juices.
Layer the ribs
Arrange the trimmed short ribs flat in the slow cooker, edges touching but not stacked. Pour the sauce over, spreading with a spoon to coat every surface. You want all meat submerged.
Cook low and slow
Cover and cook on LOW for 7 to 8 hours. After 6 hours, test with a fork: it should slide in with almost no resistance. The meat will start pulling apart on its own when done.
Defat and shred
Spoon off any visible surface fat. The sauce beneath will be thick and glossy. Shred the beef with two forks, it should separate into long strands easily.
Toss the meat back into the sauce to coat.
Slow Cooker Beef Short Ribs
Ingredients
- 3 lb boneless beef short ribs excess fat removed
- 1 can (10.5 oz) cream of mushroom soup
- 1 packet (1 oz) dry onion soup mix
- ½ cup low-sodium beef broth
Instructions
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.
Swapping the Soup and Onion Mix Without Losing the Gravy
Cream of mushroom soup: Cream of chicken soup or cream of celery soup. The sauce stays thick and umami-rich, but the flavor shifts from earthy mushroom to savory chicken or mild celery. If you use cream of chicken, the final gravy tastes more like a pot roast sauce.
Cream of mushroom soup: Homemade béchamel (2 tbsp butter, 2 tbsp flour, 1 cup milk, salt, and 1/2 tsp onion powder). You lose the condensed soup’s concentrated flavor, so the gravy will be thinner and less savory. To compensate, add 1 tsp Worcestershire sauce or a splash of soy sauce for depth.
Dry onion soup mix: 2 tbsp dried minced onion + 1 tsp garlic powder + 1 tsp beef bouillon powder. The homemade mix gives you control over salt and onion intensity.
Start with half the broth called for, as the bouillon adds salt. The gravy will have a cleaner onion flavor, not as complex as the packet, but still plenty savory.
Cream of mushroom soup: Gluten-free cream of mushroom soup (like Pacific Foods or homemade GF béchamel). The sauce will thicken similarly if you use a GF condensed soup. A homemade GF béchamel (using rice flour or cornstarch) yields a thinner consistency, so simmer it for a few minutes to thicken before adding to the slow cooker.
Storing and Serving Leftovers
Store leftover shredded beef and sauce together in an airtight container. The sauce thickens as it chills and the gelatin from the collagen sets, so don’t worry when it looks like a meat jelly.
In the fridge it keeps for up to 4 days. The texture stays tender, though the sauce may tighten further.
To reheat, spoon portions into a saucepan and warm over medium low, stirring occasionally. Add a splash of beef broth or water if it’s too thick. You can also microwave in 30 second bursts, stirring between each, until hot.
Serve again over mashed potatoes or noodles. Freezing works: pack the beef and sauce in a freezer safe container, leaving headspace.
It keeps for up to 3 months. Thaw overnight in the fridge before reheating. The sauce may separate slightly after freezing; a vigorous stir while reheating brings it back.
For best texture, eat within the first day or two of refrigeration, but leftovers remain satisfying through day four.
Tips
- If you sear the short ribs, deglaze the skillet with a splash of the beef broth and scrape up the browned bits, then add that liquid to the slow cooker for extra depth.
- Searing works best if you pat the ribs dry with paper towels first; moisture on the surface prevents browning.
Frequently Asked Questions
Can I cook these short ribs on HIGH instead of LOW? How does that affect the texture?
Yes, you can cook on HIGH for 4 to 5 hours. The meat will still be fork-tender, but the texture won’t be quite as silky as the low-and-slow version.
The collagen breaks down less gradually, so the shreds are slightly firmer. Stick with LOW for the most consistent, pull-apart result.
Can I make this recipe ahead of time and reheat it?
Absolutely. Store the shredded beef and sauce together in an airtight container in the fridge for up to 4 days. The sauce will thicken into a meat jelly as it chills; don’t worry, that’s the collagen setting.
Reheat in a saucepan over medium-low, adding a splash of broth or water if it’s too thick.
What should I serve with these short ribs to soak up the sauce?
Mashed potatoes are the classic choice, the gravy clings to every forkful. Wide egg noodles or creamy polenta also work well, as the thick sauce coats them easily. Rice soaks it up too, but the gravy is rich enough to stand up to any starch.
