How to Cook Bison Osso Buco in the Oven or Instant Pot

The best part of a pot of osso buco is the sound of the spoon. You press it against the meat, and the whole shank gives way and slides off the bone in one soft piece. In the center of the bone, a small column of marrow sits pale and glossy, waiting to be scooped out and spread on toast. Around you, the kitchen smells like tomatoes, wine, and thyme. It is a dish with an Italian name and a humble heart, because all it really asks for is a pot, a lid, and time. Bison makes a particularly good version, with a deep, rich flavor that stands up to a bold braise, and it is much easier than it looks.

Quick answer: To cook bison osso buco in the oven, sear the shanks, then braise them in wine, tomatoes, and broth in a 300°F oven for about 3 hours, until the meat falls off the bone. In an Instant Pot, sear the shanks on the sauté setting and cook on high pressure for 75 minutes with a 20 minute natural release. Finish with a fresh gremolata and scoop out the marrow.

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What Is Osso Buco?

Osso buco is an Italian dish, and the name means "bone with a hole." It is made from thick slices cut across the leg shank, so each piece has a round bone in the middle filled with marrow. Traditionally it is made with veal. The shanks are browned, then slowly braised with vegetables, white wine, tomatoes, and broth until the meat is meltingly tender. It is finished with a bright mix of lemon zest, garlic, and parsley called gremolata, which cuts through the richness. The dish is simple, but the slow braise turns a tough, hard-working cut into something silky.

Why Does Bison Osso Buco Work So Well?

Our Bison Osso Buco is the bison leg shank, cut across the bone, and it is a Beck and Bulow favorite. The shank is full of connective tissue, which turns to rich gelatin in a long braise, and the marrow in the center of each bone adds flavor and body to the sauce. Bison is naturally lean, so it takes on the flavors of a good braise very well. Osso buco is forgiving and hard to mess up as long as it is covered in liquid while it cooks. 

What Goes Into the Braise?

The classic base is a mix of finely chopped onion, carrot, and celery, called a soffritto, which melts into the sauce. For a full batch, use one onion, two carrots, two celery stalks, four smashed garlic cloves, two tablespoons of tomato paste, one can of crushed tomatoes, one cup of dry white wine, two cups of beef broth, a few sprigs of fresh thyme, and a bay leaf. A little flour on the shanks before searing helps them brown and thickens the sauce. If you prefer red wine, it works well with bison and gives a deeper, darker sauce. The liquid should come about three quarters of the way up the shanks, so the meat is mostly submerged.

How Do You Cook Bison Osso Buco in the Oven Step by Step?

1. Tie a piece of kitchen twine around the edge of each shank so the meat stays attached to the bone as it cooks.
2. Pat the shanks dry, season them generously with salt and pepper, and dust them lightly with flour.
3. Heat a heavy, oven-safe pot over medium-high heat with a little oil and sear the shanks for 3 to 4 minutes per side, until deeply browned, then move them to a plate.
4. Lower the heat to medium, add the onion, carrot, and celery, and cook for 6 minutes until softened, then stir in the garlic and tomato paste for 1 minute.
5. Pour in the wine and scrape up the browned bits from the bottom of the pot, then simmer for 3 minutes.
6. Add the tomatoes, broth, thyme, and bay leaf, then nestle the shanks back into the pot so the liquid comes about three quarters of the way up.
7. Bring it to a gentle simmer, cover the pot tightly, and move it to a 300°F oven.
8. Braise for about 3 hours, until the meat is fork tender and pulling away from the bone.
9. Let the shanks rest in the covered pot for 15 minutes before serving.

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How Do You Cook Bison Osso Buco in an Instant Pot Step by Step?

1. Tie twine around each shank, pat them dry, season them well, and dust them lightly with flour.
2. Set the Instant Pot to sauté on high, add a little oil, and sear the shanks for 3 minutes per side in batches, then move them to a plate.
3. Add the onion, carrot, and celery and cook for 4 minutes, then stir in the garlic and tomato paste for 1 minute.
4. Pour in the wine and scrape up all the browned bits so nothing sticks and triggers a burn warning.
5. Add the tomatoes, one cup of broth, the thyme, and the bay leaf, then stand the shanks upright in the pot so the bones face up.
6. Lock the lid, set the valve to sealing, and cook on high pressure for 75 minutes.
7. Let the pressure release naturally for 20 minutes, then turn the valve to venting to release the rest.
8. Lift the shanks out gently, since they will be very tender, and use the sauté setting to simmer the sauce for 10 minutes until it thickens.

An Instant Pot or pressure cooker can have this dish ready in as little as 90 minutes, and that timing includes the time to build pressure and the natural release. If your shanks are very thick and still firm in the center, lock the lid again and cook on high pressure for 10 more minutes.

Which Is Better, the Oven or the Instant Pot?

Both give you tender meat, and the best choice depends on your schedule. The oven builds a deeper, more roasted flavor and lets the sauce reduce slowly. The Instant Pot is faster and keeps the meat very moist. Here is how they compare.

Method	Time	Best For	Result
Oven braise	About 3 hours at 300°F	Weekend dinners and deep flavor	Rich, roasted flavor and a silky sauce
Instant Pot	About 90-120 minutes total	Busy evenings	Very tender meat with a lighter sauce
Slow cooker	6 to 8 hours on low	Hands-off, all-day cooking	Soft meat that falls off the bone

Why Tie the Shanks With Twine?

As the shanks cook, the connective tissue melts and the meat relaxes. Without something to hold it, the meat can pull away from the bone and fall apart in the pot, which is delicious but not very pretty. A loop of kitchen twine around the edge of each shank keeps everything together so the pieces come out whole, with the bone and marrow right in the center. Snip the twine off before you serve. It is a small step that makes the dish look like it came from a restaurant.

Why Dust the Shanks With Flour Before Searing?

A light coating of flour does two helpful things. It dries the surface, which helps the meat brown more deeply and evenly in the hot pot. It also adds a little body to the sauce as the flour cooks into the liquid, so the sauce turns slightly thicker and glossier without any extra work. Shake off the extra flour before the shanks go into the pot, because a heavy coat will turn pasty. You only need a thin dusting, just enough to see a pale film on the surface of the meat.

What Is Gremolata, and Why Does It Matter?

Gremolata is a fresh, zesty topping, and it is the finishing touch that makes osso buco taste complete. Mix together a handful of finely chopped parsley, the zest of one lemon, and one very finely minced garlic clove. Sprinkle it over the shanks right before serving. The braise is deep, rich, and savory, and the gremolata adds brightness, a little sharpness, and a pop of green color. Without it, the dish can taste a bit heavy. With it, every bite feels balanced. It takes two minutes, and it is worth it every time.

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What Do You Do With the Bone Marrow?

The marrow is a treat. Each bone has a cylinder of soft, rich marrow in the center, and after the long braise, it is tender and spreadable. The product page notes that it can be scooped out with a spoon. Use a small spoon or the tip of a knife to push it out of the bone, then spread it on toasted bread with a pinch of flaky salt, or stir it into the sauce for extra richness. Any bones left over can go back into a pot of water to simmer into a flavorful soup stock.

How Do You Know the Osso Buco Is Done?

Look for meat that is fork tender and pulling away from the bone. A fork should slide in with no resistance, and the bone should wiggle freely. For a pull-apart texture, the meat reaches about 200°F inside, but you do not need a thermometer to tell. If a fork meets resistance, the connective tissue has not melted yet, so cover the pot and cook it longer. Osso buco is forgiving. A little extra time in the liquid only makes it more tender, as long as the shanks stay mostly covered.

How Do You Finish the Sauce?

After the shanks come out, skim the fat from the top of the sauce with a wide spoon. Then simmer the sauce in the pot or in a wide pan for 10 to 15 minutes, until it thickens enough to coat the back of a spoon. Taste it and add salt, pepper, or a squeeze of lemon if it needs brightness. Remove the thyme stems and the bay leaf. If you want a smoother sauce, use an immersion blender for a few seconds. Spoon the sauce over the shanks and top with gremolata.

Can You Cook Bison Osso Buco in a Slow Cooker?

Yes. The product page notes that osso buco is perfect for the crockpot as long as it is covered in liquid. Sear the shanks first for the best flavor, then place them in the slow cooker with the vegetables, tomatoes, wine, broth, and herbs. Cook on low for 6 to 8 hours, checking at the 6 hour mark, until the meat falls off the bone. Keep the lid closed as much as possible, since each peek adds time. Finish the sauce on the stove.

What Should You Serve With Osso Buco?

The classic partner is risotto Milanese, a creamy, saffron-scented rice that soaks up the sauce. Soft polenta, creamy mashed potatoes, or buttered egg noodles work just as well. A green salad with a sharp lemon dressing or sauteed spinach adds freshness. Always set out some crusty bread, because you will want something to scoop up the sauce and the marrow. A glass of dry red or white wine is a lovely match.

What Are the Most Common Osso Buco Mistakes?

Skipping the Sear

Browning builds flavor in the meat and the sauce. Take a few minutes to brown every side.

Letting the Shanks Dry Out

Osso buco is forgiving only when it stays covered in liquid. Keep the liquid about three quarters of the way up.

Cooking It Too Hot or Too Fast

High heat makes the shanks tough. Stay at 300°F in the oven, and give the Instant Pot the full time.

Skipping the Twine

The meat can fall away from the bone. Tie each shank before you sear it.

Forgetting the Gremolata

Without it, the dish can taste heavy. A fresh topping of parsley, lemon zest, and garlic balances the richness.

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Troubleshooting: What Went Wrong and How to Fix It

My Osso Buco Was Tough

It needs more time. Cover it and keep cooking until a fork slides in with no resistance.

My Sauce Was Too Thin

Lift out the shanks and simmer the sauce for 10 to 15 minutes until it reduces and thickens.

My Sauce Was Too Greasy

Skim the fat with a wide spoon before you finish the sauce.

My Instant Pot Showed a Burn Warning

Browned bits were stuck to the bottom. Deglaze well with the wine and scrape the pot clean before you lock the lid.

My Shanks Fell Apart

They were probably not tied, or they were lifted out too roughly. Tie them next time, and use a wide spatula or two spoons to move them.

Frequently Asked Questions

What is bison osso buco?

It is the bison leg shank, cut across the bone into thick pieces with marrow in the center, and cooked low and slow until the meat falls off the bone.

How long does it take to cook bison osso buco in the oven?

Plan on about 3 hours in a 300°F oven, until the meat is fork tender and pulling away from the bone.

How long does bison osso buco take in an Instant Pot?

Cook it on high pressure for 75 minutes with a 20 minute natural release. You can do a little less or more depending on the size of the shanks. 

Do I need to cover the shanks in liquid?

Yes. The liquid should come about three quarters of the way up, so the meat stays mostly submerged and cooks evenly.

What do I do with the bone marrow?

Scoop it out with a small spoon and spread it on toasted bread with a pinch of salt, or stir it into the sauce for extra richness.

Where can I buy bison osso buco online?

You can order our Bison Osso Buco online and have it shipped to your door.

Ready to Cook Bison Osso Buco at Home?

If you want to buy bison osso buco online, we make it easy. You can order bison online without a trip to a specialty butcher, and it ships right to your door, ready for your next slow-cooked dinner. Browse the full bison collection to find the best place to buy bison online for shanks, roasts, and steaks. For questions about how to cook bison osso buco or where to buy bison, call us at 800-674-8426.