Slow Cooker Oxtail Recipe

This rich, tender slow cooker oxtail is absolute comfort food at its finest. Served over creamy mashed cauliflower, it’s the kind of dinner that warms you up inside and hits all the right savory notes. Plus, the leftovers keep beautifully for several days and actually taste even better the next day — hello, meal prep win!

Much like pot roast, beef cheeks, or beef back ribs, slow cooker oxtail gives you that melt-in-your-mouth, fall-off-the-bone goodness we all crave in a hearty winter meal. The fat renders slowly, infusing the meat with deep flavor that’s both rich and comforting. If you enjoy meaty, aromatic stews with layers of flavor, this recipe is going to be your new favorite. And the best part? You basically set it and forget it in your slow cooker while it works its magic.

This slow cooker oxtail comes out rich and bursting with flavor, perfect served on a bed of mashed cauliflower for a cozy, satisfying meal.

Notes

• The seasoning directions are flexible — feel free to adjust the salt and sweetness levels to match your taste buds.
• This recipe will give you around 20 ounces of cooked meat, bones removed.
• If there’s too much fat in your cooking liquids, it’ll make the glaze separate when thickened. A little trick I use: pop that cup of cooking liquid in the freezer for a few minutes so the fat hardens on top, then scoop it off easily.
• If your slow cooker is bigger than 6 quarts, you might need a bit more liquid or a slightly shorter cooking time.
• When I’m in a rush, I sometimes skip the Asian panoply of ingredients. Instead, I season the oxtails simply with kosher salt, black pepper, garlic powder, smoked paprika, and ground cumin. I add ¼ cup water, cover, and cook on low for 8 hours. The flavor changes but it’s just as delicious.
• If you use less than 3 pounds of meat, plan to cut back cooking time a bit.
• Leftovers keep well in a sealed container in your fridge for 3 to 4 days. Like many slow-cooked stews, they taste even better the next day after the flavors blend. Reheat gently, covered, in the microwave at 50% power or warm on the stovetop. You can freeze leftovers for up to 3 months for stress-free future meals.

Nutrition per Serving

Serving: 5 ounces meat without bones | Calories: 317 kcal | Carbohydrates: 8 g | Protein: 31 g | Fat: 17 g | Saturated Fat: 6 g | Sodium: 799 mg | Sugar: 4 g

If you get as excited as I do for slow, melt-in-your-mouth beef dishes like pot roast or beef cheeks, this slow cooker oxtail is a dream come true. The meat gets incredibly tender, practically sliding off the bone, and the glossy sauce reduces into a rich, flavorful glaze perfect for spooning over mashed cauliflower or other favorite sides. This recipe is about as hands-off as it gets — just 15 minutes of prep and then around 8 hours on low. Plus, the leftovers? They only get better after a day in the fridge.

• Here’s what you’ll find: a full ingredient list with exact amounts, clear step-by-step instructions with photos, handy tips on skimming fat and thickening sauce, flavor swaps and shortcuts, plus advice for storing, reheating, and answers to common questions.
• Who this is for: anyone who wants a simple, set-it-and-forget-it slow cooker meal that delivers deep, restaurant-quality flavors with very little babysitting.

What Makes It Special

This slow cooker oxtail stands out because it’s loaded with flavor and incredibly tender. After that long, low cooking time, the meat falls right off the bone, and the sauce thickens into a gorgeous, rich glaze. That same slow, gentle simmer is what builds deep flavor in Vietnamese pho with bone broth (slow cooker) as well. It’s as easy as it gets – you toss everything in your slow cooker, and hours later, you’re rewarded with a feast. For a cozy, classic variation, try our Oxtail Stew. Not to mention the dish is super versatile — it pairs wonderfully with mashed cauliflower, veggies, or even zucchini noodles. It’s also gluten-free friendly, and leftover flavors actually deepen after resting, making it perfect for meals ahead or enjoying over a few days.

Ingredients and Key Swaps

• 3 pounds oxtails – raw, bone-in
• ¼ cup reduced-sodium soy sauce – or use a gluten-free option if you prefer
• 1 tablespoon toasted sesame oil
• 1 tablespoon rice vinegar
• 1 tablespoon honey
• 1 teaspoon hot sauce – like sriracha for a touch of heat and complexity
• 1 teaspoon kosher salt – or about ½ teaspoon of another salt you have on hand
• ½ teaspoon black pepper
• 1 teaspoon garlic powder
• 1 tablespoon cornstarch

Make It in the Slow Cooker

1. Place 3 pounds oxtails into a 6-quart slow cooker.
2. In a medium bowl whisk 1/4 cup soy sauce, 1 tbsp toasted sesame oil, 1 tbsp rice vinegar, 1 tbsp honey, 1 tsp hot sauce, 1 tsp kosher salt, 1/2 tsp black pepper, and 1 tsp garlic powder; pour mixture over oxtails and stir to coat.

3. Cover slow cooker and cook on LOW for about 8 hours, until meat is tender and falling off the bone.

4. Carefully transfer the cooked oxtails to a platter and pour the cooking juices through a strainer into a measuring cup.
5. Return the oxtails to the slow cooker, cover, and set to WARM.
6. Skim fat from the strained cooking liquid and pour the defatted liquid into a medium saucepan; bring to medium heat.
7. Mix 1 tbsp cornstarch with 1 tbsp cold water to make a slurry, whisk it into the simmering liquid, and cook, stirring, until the sauce thickens, about 3–5 minutes.
8. Place the oxtails on a serving platter and spoon the glossy sauce over the top.

Pro Tips for Best Results

Skip Browning the Meat

You can skip the extra step of browning the oxtails before cooking. I promise, they still come out perfectly tender and packed with flavor straight from the slow cooker. If you want another take on oxtail, check out The Oxtail Recipe I Make on Calm Days.

Oxtail Parts

The oxtail is made up of the tailbone and marrow surrounded by layers of meat and fat. The butcher usually trims some fat, but there’s still enough to keep the meat juicy and rich. You’ll notice beautiful marbling, which adds to the tenderness and flavor. Those collagen-rich bones are also perfect for simmering into a hearty beef and vegetable bone broth.

Different Sizes

Oxtails come in varying sizes because they’re cut from different sections of the tail. The larger pieces are nearer the base of the tail, and smaller ones come from the tip. Don’t worry about mixing them — all sizes cook well together and come out tender.

Storage Tips

Store leftover slow cooker oxtail in an airtight container in your fridge for 3 to 4 days. Like many slow cooker meals, it tastes even better the next day as the flavors have time to mingle. When reheating, cover and warm it gently in the microwave at half power or warm up on the stove. Freeze leftovers for up to three months for easy meals whenever you need them.

Since slow cooker oxtail comes with rich sauce, I love serving it over something that soaks up all those delicious juices, like:

• Mashed cauliflower
• Cauliflower rice
• Zucchini noodles
• Spaghetti squash noodles
• Mashed butternut squash

And of course, don’t forget some green veggies on the side. Roasted asparagus, broccoli, or green beans are all fantastic choices.

• Roasted asparagus
• Roasted broccoli
• Roasted green beans

Easy Variations and Swaps

If you’re short on time or ingredients, no worries! You can skip the Asian-style sauce and simply season the oxtails with kosher salt, black pepper, garlic powder, smoked paprika, and ground cumin. Add about ¼ cup water, cover, and cook low and slow for 8 hours. The flavors will be different but equally satisfying. For a simple serving idea, spoon the cooking juices over one-pot mushroom rice, or lean Caribbean with a side of Cuban mojo roasted plantains.

Storage, Freezing, and Reheating

Let leftovers cool to room temperature before transferring to an airtight container for refrigeration, good for 3 to 4 days. To freeze, pack the cooled oxtails and sauce into freezer-safe containers or bags for up to three months (see these freezer and refrigerator storage methods for an example you can follow). Thaw overnight in the fridge before reheating.

To remove extra fat, chill the cooking liquids or finished dish until the fat solidifies, then lift it off. You can also skim fat from warm liquids with a spoon before thickening the sauce.

Reheat leftovers gently on the stovetop over low to medium heat, stirring here and there until warm. The microwave works great too — just cover and warm at half power in short bursts to avoid overcooking. For oven reheating, place in a covered dish and heat at 325°F (160°C) until warmed through.

If you want to make this ahead, cook the oxtails a day early and refrigerate — the flavors only improve! You can also reduce and thicken the sauce ahead of time, store it separately, and then warm everything gently before serving.

Common Questions Answered

• Can I brown the oxtails first?
  Nope, it’s totally optional! This recipe works beautifully without browning, but if you want a deeper flavor and crust, searing them first won’t hurt.
• Can I use frozen oxtails?
  It’s best to thaw frozen oxtails in the fridge overnight before cooking. If you’re in a pinch and cook them from frozen, expect a much longer cook time and make sure the meat is tender before serving.
• How do I know when the oxtails are done?
  They’re done when the meat is super tender and falling away from the bone, which usually takes about 8 hours on LOW in a 6-quart slow cooker.
• What can I use instead of cornstarch?
  Arrowroot powder works great as a 1:1 substitute. You can also use a flour slurry but you’ll need a bit more and a longer cook time to cook out the flour taste.
• How do I reduce excess fat in the sauce?
  Skim off fat with a spoon while the sauce is warm, or refrigerate the cooking juices until fat solidifies and remove it easily. Another trick is chilling the cup of cooking liquids briefly before skimming.
• Can I make this in a pressure cooker or oven?
  Absolutely! In a pressure cooker, cook on high pressure for about 60 to 90 minutes, then let the pressure release naturally. In the oven, braise covered at 300–325°F (150–160°C) until tender — time will vary depending on size.
• Is this recipe gluten-free?
  Yes! Just swap soy sauce for a gluten-free tamari or coconut aminos and you’re good to go. For another easy gluten-free dinner idea, try our Gluten-Free Orange Chicken.