Flanken ribs in the oven become tender and deeply flavorful when you slow-roast them at the right temperature, allowing the marinade to caramelize beautifully. If you want to learn how to cook beef flanken ribs in the oven, the process is simpler than you might think.
These thin-cut ribs come from the chuck or short rib area. They cook faster than thick short ribs, but they still need low heat and patience to get soft.
What Are Beef Flanken Ribs?
Flanken ribs are cut across the bone instead of along it. That means each piece has small sections of bone running through the meat.
You will usually see them sold as thin strips, about half an inch thick. This cut works great for oven roasting because the marinade seeps into every part of the meat.
They are popular in Korean and Jewish cooking. Korean galbi uses a soy-based marinade, while Jewish flanken is often simmered in a sweet and sour sauce.
How To Cook Beef Flanken Ribs In The Oven
Follow these steps for soft, rich ribs every time. The whole process takes about two and a half hours, but most of that is hands-off cooking.
Ingredients You Will Need
- 3 pounds of beef flanken ribs
- 1 cup soy sauce
- 1/2 cup brown sugar
- 1/4 cup rice vinegar or apple cider vinegar
- 4 cloves garlic, minced
- 1 tablespoon fresh ginger, grated
- 2 tablespoons sesame oil
- 1 onion, sliced
- 1 cup beef broth
- Salt and black pepper to taste
You can swap the soy sauce for coconut aminos if you need a gluten-free version. The brown sugar helps the meat brown and gives a nice glaze.
Step 1: Prep The Ribs
Pat the ribs dry with paper towels. Trim any large chunks of hard fat, but leave the thin membrane alone.
Season both sides with salt and pepper. Let them sit at room temperature for 20 minutes while you make the marinade.
Step 2: Make The Marinade
In a bowl, whisk together soy sauce, brown sugar, vinegar, garlic, ginger, and sesame oil. Stir until the sugar dissolves.
Pour half of the marinade over the ribs in a shallow dish. Cover and refrigerate for at least 1 hour, or up to 8 hours for deeper flavor.
Keep the other half of the marinade for basting later.
Step 3: Preheat The Oven
Set your oven to 325°F (163°C). This low temperature is key for tender meat.
Place the rack in the middle position. Line a baking sheet with foil for easier cleanup.
Step 4: Arrange The Ribs
Lay the marinated ribs in a single layer on the baking sheet. Do not overlap them, or they will steam instead of roast.
Scatter the sliced onion around the ribs. Pour the beef broth into the pan, not over the meat. This keeps the environment moist.
Step 5: Cover And Bake
Cover the pan tightly with foil. Bake for 1 hour and 30 minutes.
The steam trapped inside helps break down the connective tissue. This is what makes flanken ribs tender.
Step 6: Uncover And Glaze
Remove the foil after 90 minutes. Spoon the reserved marinade over the ribs.
Turn the oven up to 400°F (204°C). Bake uncovered for another 15 to 20 minutes.
Watch closely during this stage. The sugar in the marinade can burn fast. You want a dark, sticky glaze, not a black crust.
Step 7: Rest Before Serving
Take the pan out of the oven. Let the ribs rest for 10 minutes.
This allows the juices to settle. Cut between the bones if needed, then serve hot.
Tips For The Best Results
Choose The Right Cut
Look for ribs with good marbling. Too much white fat means chewy meat. A little fat is fine because it melts during cooking.
Ask your butcher to cut them about 1/2 inch thick. Thicker cuts need more time in the oven.
Do Not Skip The Marinade
Even 30 minutes helps. But if you have time, let them sit overnight. The acid in the vinegar and the salt in the soy sauce work together to tenderize.
Keep The Pan Covered Early On
Uncovering too soon dries out the meat. The first 90 minutes should be covered. Only uncover at the end for browning.
Watch The Sugar Content
If your marinade has a lot of sugar, lower the final oven temp to 375°F. This prevents burning while still giving you a nice color.
Common Mistakes To Avoid
- Using high heat the whole time. This makes the meat tough.
- Forgetting to pat the ribs dry. Wet meat does not brown well.
- Overcrowding the pan. Give each rib its own space.
- Skipping the rest period. Cutting too soon loses juices.
- Not tasting the marinade. Adjust salt and sugar before pouring.
Serving Suggestions
These ribs go well with steamed rice or mashed potatoes. A simple cucumber salad adds a fresh crunch.
You can also slice the meat off the bone and use it in tacos or sandwiches. The leftover marinade in the pan makes a great sauce if you skim off the fat.
Store leftovers in the fridge for up to 3 days. Reheat in a covered pan at 300°F so they do not dry out.
Now you know how to cook beef flanken ribs in the oven with confidence. Low heat, a good marinade, and a final high-heat glaze are all you need for tender, tasty results.