Flanken Soup with Barley and Vegetables

Flanken soup is a slow-simmered beef soup made with flanken—short ribs cut across the bone—plus barley, root vegetables, and a savory broth. It is often associated with Ashkenazi and Eastern European home cooking, though family versions vary; the long, gentle simmer gives the beef time to turn tender and enrich the broth.

Ingredients

3 lb (1.36 kg) flanken-cut beef short ribs, cut about ½ inch (1.3 cm) thick
10 cups (2.4 L) cold water
2 cups (475 ml) low-sodium beef broth
1 large yellow onion, about 10 oz (280 g), peeled and quartered
3 medium carrots, about 10 oz (300 g), peeled and cut into ½-inch (1.3 cm) pieces
3 celery ribs, about 6 oz (170 g), sliced
2 medium parsnips, about 8 oz (225 g), peeled and cut into ½-inch (1.3 cm) pieces
1 lb (450 g) waxy potatoes, such as Yukon Gold, cut into ¾-inch (2 cm) cubes
¾ cup (150 g) pearl barley, rinsed and drained
3 garlic cloves, about 15 g, lightly crushed
2 dried bay leaves
1½ tsp (9 g) kosher salt, plus more to taste
½ tsp (1 g) freshly ground black pepper, plus more to taste
¼ cup (10 g) chopped fresh dill, plus extra for serving
1 tbsp (15 ml) fresh lemon juice, optional

Instructions

Prepare the ingredients. Rinse the barley under cool water and drain it. Pat the flanken dry with paper towels, then check for any loose bone fragments and remove them. Cut the vegetables before you start cooking so they can be added promptly later. If the ribs have a thick, hard strip of surface fat, trim away some of it, but leave a little fat for flavor.
Start the broth. Put the ribs, water, beef broth, onion, garlic, bay leaves, salt, and pepper in a large heavy soup pot. The liquid should mostly cover the ribs; add a little water if needed. Set the pot over medium-high heat and bring it just to a boil, watching closely. As gray foam rises, skim it off with a spoon. Once the surface reaches a steady simmer, lower the heat so the liquid bubbles gently rather than boiling hard.
Simmer the beef. Partially cover the pot and simmer the ribs for 1 hour 30 minutes, turning them once if they are not fully submerged. Keep the heat low and skim excess fat from the surface as it collects. Check the thickest meaty portion away from the bone with a food thermometer: USDA FSIS lists 145°F (63°C), followed by a 3-minute rest, as the safe minimum for whole cuts of beef. For this soup, continue simmering beyond that minimum until the meat is tender enough to pull from the bone.
Add the barley and vegetables. Stir in the rinsed barley, carrots, celery, parsnips, and potatoes. Make sure the barley is submerged; add up to 1 cup (240 ml) water if the pot looks low. Return the soup to a gentle simmer, partially cover, and cook for 40 to 45 minutes. Stir once or twice, especially along the bottom of the pot, so the barley does not stick. The barley should be plump and tender, and the vegetables should yield easily when pierced with a fork.
Check the beef and season. Lift out a rib with tongs and test the meat with a fork. If it still feels tough, return it to the pot and simmer for another 10 to 15 minutes; the precise time depends on the thickness of the flanken and the cut. When tender, remove the bones and any large pieces of gristle. Pull the meat into bite-size pieces, taking care to feel for small bone fragments, and return the meat to the soup.
Finish the soup. Remove the onion quarters and bay leaves. Taste the broth and add more salt or pepper as needed. Stir in the dill and, if you like a brighter finish, the lemon juice. Let the soup simmer for 2 minutes, then turn off the heat. If the soup seems thicker than you prefer, loosen it with hot water or broth a little at a time; barley continues to absorb liquid as it stands.
Serve hot. Ladle the soup into warm bowls, making sure each serving gets beef, barley, and vegetables. Offer extra dill and black pepper at the table. The recipe takes about 30 minutes of preparation and 2 hours 30 minutes of cooking, including simmering, for a total elapsed time of about 3 hours.

Tips

Choose the right cut. Ask for flanken-cut short ribs sliced across the bones, usually around ½ inch thick. English-cut short ribs are cut parallel to the bone and are thicker; they can work, but they may need additional simmering time. If flanken is unavailable, use bone-in beef short ribs and cook until tender rather than relying only on the clock.
Keep the broth at a quiet simmer. A rolling boil can make the meat seem dry and break vegetables apart before the beef is tender. Look for occasional small bubbles at the edges of the pot. Skimming foam early helps the broth look clearer, while leaving a little fat adds flavor.
Adjust salt for your broth. Low-sodium broth gives you more control, but broth brands and short ribs vary in saltiness. Start with the amount listed, then taste near the end and adjust. If the soup reduces more than expected, add water before adding extra salt.
Plan for barley to thicken the pot. Pearl barley keeps absorbing broth while the soup rests and after refrigeration. Keep a kettle of hot water or extra broth nearby for thinning leftovers. For a gluten-free version, replace barley with rice and see the variation notes below.

Serving Suggestions

Serve flanken soup as a filling main course in wide bowls, with a piece of crusty bread, rye bread, or a simple roll for dipping. A crisp green salad with a tart vinaigrette balances the rich broth, while sliced cucumbers or lightly dressed cabbage make an easy fresh side. Set out extra dill, black pepper, and lemon wedges so everyone can adjust the bowl to taste. If you are serving a larger meal, keep portions moderate and follow the soup with fruit or a light dessert.

For a generous bowl, include a little of everything rather than piling one serving with only meat or barley. The bones are removed before serving, but check each portion as you ladle in case a small fragment was missed. The soup is substantial enough to stand on its own for lunch, especially with bread, and it also works as a first course when served in smaller cups.

Variations

Use rice instead of barley: For a gluten-free alternative, omit the barley and add ½ cup (90 g) rinsed long-grain rice during the final 20 minutes of simmering. Rice makes the broth less earthy and somewhat lighter, and it can soften faster than barley, so check it near the end. Use rice labeled gluten-free if cross-contact is a concern.

Make it with cabbage: Add 3 cups (210 g) thinly sliced green cabbage with the other vegetables. It softens into the broth and gives the soup a sweeter, more old-fashioned vegetable-soup character. If you want the cabbage to retain more texture, add it during the last 20 minutes instead.

Change the root vegetables: Replace the parsnips with an equal weight of turnip or additional carrots. Turnip brings a mild, slightly peppery flavor; extra carrots make the soup sweeter. You can also omit the potatoes and add another ½ cup (100 g) barley, but the soup will be thicker and more grain-forward.

Add herbs to suit the broth: Dill is a classic fresh finish for this style of soup. If it is hard to find, use 2 tbsp (6 g) chopped flat-leaf parsley instead; the result tastes greener and less distinctive. Dried dill is more concentrated, so use 2 tsp (2 g) and add it during the final 10 minutes rather than using the full fresh-herb amount.

Storage and Reheating

Refrigerate the soup within 2 hours of cooking. For faster cooling, divide it among shallow containers rather than leaving a large stockpot on the counter. Refrigerate covered for 3 to 4 days. The barley will absorb broth as it sits, so the chilled soup may look more like a stew; that is normal and can be corrected with water or broth when reheating.

For longer storage, freeze the soup in airtight, freezer-safe containers for about 2 to 3 months for best quality. Leave a little room at the top for expansion. Thaw it overnight in the refrigerator, or reheat from frozen over low heat with a splash of water, stirring as it loosens. If you expect to freeze the whole batch, you can also cook the barley separately and add it to portions later; this helps it keep a firmer texture.

Reheat only the portion you plan to serve, stirring occasionally on the stovetop until it is steaming throughout and reaches 165°F (74°C). In a microwave, use a covered microwave-safe bowl, stir midway through, and check the temperature in several spots because thick soup heats unevenly. Add liquid gradually, then taste again for salt and pepper.

Frequently Asked Questions

What is flanken in flanken soup?

Flanken is beef short rib cut crosswise through the bones, leaving several small bone sections in each strip. It is different from English-cut short ribs, which are cut parallel to the bones and are usually thicker. The cross-cut pieces release flavor into the broth and become tender during a long simmer.

Can I make flanken soup a day ahead?

Yes. Cool and refrigerate it promptly, then reheat it gently the next day to 165°F (74°C). The flavor has time to settle, but the barley will thicken the soup overnight. Add broth or water while reheating and adjust the seasoning after the liquid is hot.

Why is my beef still tough?

Beef can reach a safe temperature before its connective tissue has softened enough to feel tender. Keep the soup at a gentle simmer and give the ribs more time, checking every 10 to 15 minutes. Avoid raising the heat to a hard boil, which will not reliably make the meat tender faster.

Can I use boneless short ribs?

Yes, boneless short ribs can be used in the same quantity by weight. The broth may have a little less depth because there are no bones simmering in it, so use the beef broth in the ingredient list and season carefully at the end. Cut the cooked meat into bite-size pieces before serving.

Is pearl barley the same as hulled barley?

No. Pearl barley has had its outer hull and bran polished away, so it cooks more quickly and is the type used in this timing. Hulled barley retains more of the bran and usually needs a longer cooking time. If substituting hulled barley, cook it separately according to its package directions and add it when tender.

How can I keep the soup from getting too thick?

Barley continues to absorb liquid, particularly as the soup cools. Start with the full amount of water and broth, avoid cooking uncovered for long periods, and keep extra broth or hot water available. Thin each portion as needed during reheating rather than adding a large amount to the whole pot at once.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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