Oxtails need enough time in the oven for the connective tissue to break down. Until that happens, they will be tough no matter what you do.
But once they're in the oven, they're low-maintenance.
The key is knowing how long to leave them in the oven and what to look for before pulling them out.
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How Long They Take in the Oven
When I cook oxtails, they usually take about 3½ to 4 hours at 350°F.
I use that as a starting point because the size and thickness of your oxtails, and oven temperatures can cause cooking time to vary.
What to Look For Instead of Time
When they're ready:
- The meat pulls away from the bone easily
- A fork slides in without resistance
- The texture softens instead of feeling tight
Why This Cut Needs Time
If oxtails don't cook long enough, they will feel firm and will be tough. When given the right amount of time to braise in the oven, they will be succulent and extremely tender.
When to Start Checking
I usually start checking around the 2½ hour mark.
Not because I expect them to be done, but to see how they're progressing.
Why They Can Turn Out Tough
If they turn out tough, it's usually because they needed more time in the oven.
Other factors that can contribute to them being tough are:
- Cooking then at a moderately or high oven temperature
- Pulling them out before they've had a chance to tenderize
How This Fits Into the Full Method
For the full process, see my Southern braised oxtail recipe.
If you're cooking other cuts, see my 'How to Cook Beef in the Oven Guide'.
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