Slow Cooker Oxtail Recipe: Tender, Rich, and Easy to Make

Slow cooker oxtail is the kind of dinner that rewards a little patience. Oxtail is a cut with plenty of connective tissue, so it needs long, gentle cooking to turn fall-apart tender. The result is a deep, savory beef stew with silky sauce and meat that slips off the bone.

Why You’ll Love This Slow Cooker Oxtail

• Hands-off cooking: Once the pot is loaded, the slow cooker does most of the work.
• Deep, rich flavor: Browning the oxtail and simmering it with aromatics builds a savory, full-bodied sauce.
• Tender meat: Long, low cooking breaks down the connective tissue for meat that pulls easily from the bone.
• Simple ingredients: Most of the flavor comes from pantry staples and a few vegetables.
• Great for leftovers: The stew often tastes even better the next day.

Ingredients

• 3 lb (1.4 kg) oxtail, cut into pieces
• 3 tbsp (45 g) all-purpose flour, for dredging
• 1 tbsp (15 ml) vegetable oil
• 1 large yellow onion (about 10 oz / 285 g), chopped
• 2 medium carrots (about 6 oz / 170 g), cut into chunks
• 2 celery stalks (about 4 oz / 115 g), cut into chunks
• 4 garlic cloves, minced
• 2 tbsp (30 g) tomato paste
• 4 cups (960 ml) beef broth, plus more if needed
• 1 cup (240 ml) dry red wine (optional)
• 2 bay leaves
• 1 tsp (2 g) dried thyme
• 1 1/2 tsp (9 g) kosher salt, or to taste
• 1/2 tsp (1 g) black pepper
• 1 tbsp (8 g) cornstarch mixed with 2 tbsp (30 ml) cold water (optional, for thickening)

Equipment You’ll Need

• 6-quart (5.7 L) or larger slow cooker
• Large skillet
• Tongs
• Large bowl or shallow dish for dredging
• Ladle and fine-mesh strainer (optional)

How to Make Slow Cooker Oxtail

1. Pat the oxtail dry. Use paper towels to remove surface moisture. Dry meat browns better and develops more flavor.
2. Dredge the pieces. Season the oxtail with salt and pepper, then toss it in the flour in a bowl until lightly coated. Shake off any extra flour.
3. Brown the oxtail. Heat the oil in a large skillet over medium-high heat until it shimmers. Working in batches so the pan isn’t crowded, sear the oxtail for about 3 to 4 minutes per side, until deep golden brown. Transfer the pieces to the slow cooker.
4. Soften the aromatics. Reduce the heat to medium. Add the onion, carrots, and celery to the skillet and cook for about 5 minutes, until the onion turns translucent and the edges begin to brown. Stir in the garlic and tomato paste and cook for 1 minute more, until the paste darkens slightly.
5. Deglaze the pan. If using wine, pour it into the skillet and scrape up the browned bits with a wooden spoon. Let it bubble for 2 minutes, then pour everything into the slow cooker.
6. Add the liquids and herbs. Add the beef broth, bay leaves, and thyme to the slow cooker. The oxtail should be mostly submerged. Add a little more broth if needed.
7. Cook low and slow. Cover and cook on low for 8 to 10 hours, or on high for 5 to 6 hours. Cooking times are estimates and vary by cooker, so start checking the meat at the earlier end of the range.
8. Check for doneness. The oxtail is ready when the meat is very tender, pulls easily from the bone, and a fork slides through it with little resistance. If it still feels firm, cook it for another hour and check again.
9. Skim the fat. Lift out the oxtail and set it aside. Skim the surface fat from the sauce with a spoon, or refrigerate the pot briefly so the fat hardens and is easy to lift off.
10. Thicken the sauce (optional). Set the slow cooker to high. Stir in the cornstarch slurry and let the sauce simmer for 10 to 15 minutes, until it coats the back of a spoon. Discard the bay leaves, return the oxtail to the pot, and adjust the salt and pepper.
11. Serve hot. Make sure the stew is steaming hot throughout before serving.

Pro Tips for the Best Results

• Brown the oxtail in batches. A crowded pan steams the meat instead of creating a rich crust.
• Use a low-sodium beef broth so you can control the saltiness, since the sauce reduces as it cooks.
• Scrape the browned bits from the skillet. They add a lot of flavor to the finished sauce.
• Chill the stew before skimming if the fat is hard to remove.
• Taste and season at the end, not at the beginning. Flavors concentrate during long cooking.

Common Mistakes to Avoid

• Skipping the sear: Without browning, the sauce can taste flat and pale. Take the extra 15 minutes.
• Stopping too early: Oxtail that is still firm needs more time. Keep cooking until the meat is truly tender.
• Too much liquid: A slow cooker holds moisture well, so start with enough broth to cover the meat without drowning it.
• Over-salting early: Broth and reduced sauce can become very salty. Season at the end.

Variations and Substitutions

• Red wine swap: Replace the wine with extra beef broth and 1 tsp (5 ml) of red wine vinegar for a bit of acidity.
• Add potatoes: Add 1 lb (450 g) of quartered baby potatoes during the last 3 to 4 hours of cooking on low.
• Spice it up: Add a dried chili or a pinch of crushed red pepper flakes with the broth.
• Stovetop method: Simmer the oxtail covered in a Dutch oven over low heat for 3 to 4 hours, checking the liquid level as it cooks.

Serving Suggestions

Serve the oxtail over creamy mashed potatoes, buttered egg noodles, or steamed white rice to soak up the sauce. A green vegetable such as sauteed broccolini or a simple green salad adds freshness. Crusty bread is also a good choice for mopping up every bit of the gravy.

Storage and Reheating

Cool the stew and transfer it to an airtight container. Refrigerate it within 2 hours of cooking and use it within 3 to 4 days. For freezing, portion the stew into freezer-safe containers and freeze for up to 3 months. Thaw in the refrigerator overnight before reheating.

To reheat, warm the stew gently in a saucepan over medium-low heat, adding a splash of broth if the sauce has thickened. Heat until steaming hot throughout.

Frequently Asked Questions

Do I have to brown the oxtail first?

You don’t have to, but browning adds a deeper, richer flavor. If you’re short on time, you can skip it and still get tender meat, though the sauce will be lighter in color and taste.

Why is my oxtail still tough?

Oxtail needs enough time for its connective tissue to break down. Keep cooking on low and check again in an hour. Make sure the cooker is actually heating and the lid is sealed.

Can I make this ahead of time?

Yes. The stew often tastes better the next day. Cool it, refrigerate it, skim the fat, and reheat it gently before serving.

Can I cook oxtail on high instead of low?

Yes, you can. Cooking on high is faster, usually about 5 to 6 hours, but the meat may need more time to become fully tender. Check it with a fork before serving.

Can I use bone-in short ribs instead?

Bone-in short ribs are a reasonable substitute with a similar texture. The flavor will be a little different, and the cooking time may be shorter, so check for tenderness early.

Slow Cooker Oxtail Recipe Card

Recipe Name: Slow Cooker Oxtail

Short Description: Fall-apart tender oxtail simmered in a rich, savory beef sauce with carrots, celery, and herbs.

Prep Time: 30 minutes

Cook Time: 5 to 10 hours (depending on slow cooker setting)

Total Time: About 6 to 11 hours

Servings: 4 to 6

Course: Dinner, Main Course

Cuisine: American

Cooking Method: Slow cooker, pan-searing

Ingredients: 3 lb (1.4 kg) oxtail, 3 tbsp (45 g) all-purpose flour, 1 tbsp (15 ml) vegetable oil, 1 large yellow onion, 2 medium carrots, 2 celery stalks, 4 garlic cloves, 2 tbsp (30 g) tomato paste, 4 cups (960 ml) beef broth, 1 cup (240 ml) dry red wine (optional), 2 bay leaves, 1 tsp dried thyme, 1 1/2 tsp kosher salt, 1/2 tsp black pepper, cornstarch slurry (optional).

Instructions: Dredge and brown the oxtail, soften the vegetables, deglaze, add the liquids and herbs, cook on low for 8 to 10 hours or high for 5 to 6 hours until tender, skim the fat, thicken if desired, and serve hot.

Notes: Cooking times are estimates and vary by slow cooker model and oxtail size.

Storage: Refrigerate up to 3 to 4 days or freeze up to 3 months.

Nutrition information is an estimate and may vary depending on the ingredients and brands used.

Did you make this recipe? Tell us in the comments: what’s your favorite slow cooker meal?