What Is Bison Flank?

The flank is a lean, flat sheet of muscle from the belly. It has a pronounced grain and takes marinades well, which makes it a favorite for the grill.

What to know

Flank is lean and grainy, with the muscle fibers running clearly in one direction. Cook it right and it is tender; cook it wrong or slice it with the grain and it is chewy.

How to cook it

Marinate it, grill it hot and fast to medium-rare, rest it, then slice thin across the grain. It is also excellent thin-sliced for stir-fry.

Where to buy it

Bison is a small-farm product, so the best of it comes direct. Use Find a Farmer to buy bison near you, see the full Bison Meat Wiki, and check exact temperatures in our sous vide bison guide.

FAQ

Why slice bison flank against the grain?

The muscle fibers are long and obvious. Cutting across them shortens the fibers so each bite chews tender instead of stringy.

Is bison flank tender?

It is lean and can be tender when cooked to medium-rare and sliced against the grain. Overcook it and it toughens fast.

Where bison flank comes from

The flank is a lean, flat muscle from the lower belly of the animal, toward the rear behind the plate. It is a hardworking sheet of muscle with a long, pronounced grain, which gives it a bold, beefy flavor and a firm texture. The flank is a single, versatile cut rather than a region full of sub-cuts, and it has become popular for its flavor, its leanness, and its suitability for quick, high-heat cooking when handled correctly.

What makes it special

Flank is defined by its strong grain and its leanness. Those long muscle fibers carry a lot of flavor but can eat tough if you cut with them instead of across them, so the flank is the cut that most rewards proper slicing. Because it is lean, it also cooks quickly and dries out if overdone, so it lives at the intersection of two rules: cook it fast to no more than medium-rare, and always slice it thin against the grain.

Best ways to cook it

Flank wants high, fast, dry heat, ideally after a marinade. Marinate it for a few hours to add flavor and a little moisture, then grill or sear it hot and hard, cooking it only to rare or medium-rare. The goal is a good char on the outside and a juicy, rosy interior, all achieved in a few minutes per side. Overcooking is the enemy, since a lean, grainy cut like flank turns dry and chewy fast, so pull it early and let it rest.

The importance of slicing

No cut depends on slicing more than the flank. Its long fibers are obvious on the surface, and cutting across them, at a slight angle for wider slices, shortens each fiber and turns a potentially chewy steak tender. Cut with the grain instead and even a perfectly cooked flank will be stringy and tough. Always rest the flank first, then find the direction of the grain and slice thin across it. This single technique is the difference between a great flank steak and a disappointing one.

Best uses for flank

Flank’s bold flavor and thin slices make it ideal for dishes where the meat is one component among many. It is a natural for fajitas and tacos, for steak salads, for stir-fries, and for rolling and stuffing as a braciole or flank roll. Marinated and grilled, then sliced thin, it also stands on its own as a flavorful, leaner steak. Its versatility and value have made it a favorite for weeknight cooking.

Flank versus beef flank

Bison flank cooks exactly like beef flank but even leaner, so the cautions are stronger: marinate it, cook it fast and no further than medium-rare, and slice it thin against the grain. The flavor is bold and clean, and every dish that suits beef flank, from fajitas to stir-fries, works just as well with bison.

Buying, storing, and serving

Bison flank is sold as a single flat steak and is moderately priced for its flavor. Look for a deep red, cleanly trimmed piece with a visible grain, from grass-fed animals. It keeps a couple of days refrigerated and freezes well, making it a handy weeknight staple. Serve it sliced thin over salads and grain bowls, folded into tacos and fajitas with bright toppings, or alongside chimichurri, whose acidity cuts the richness and complements the bold, beefy meat.

Marinating flank for flavor and tenderness

A marinade is almost mandatory for flank, and it does two jobs. First, it seasons the lean meat and adds a little moisture that helps it stay juicy over high heat. Second, an acidic marinade with citrus, vinegar, or wine gently loosens the surface of those tough fibers, nudging the steak toward tenderness before it ever hits the heat. A few hours is plenty, and much longer with a strongly acidic marinade can start to turn the surface mushy, so do not overdo it. Oil, acid, salt, garlic, and herbs make a simple, effective base you can push in any direction, from Mexican to Korean to Mediterranean.

Common mistakes with flank

Two errors ruin most flank steaks. The first is overcooking, since a lean, grainy cut dries and toughens quickly, so it must be pulled at medium-rare and no further. The second is slicing with the grain instead of across it, which leaves even a perfectly cooked steak stringy and chewy. Avoid both, cook it fast and rare, rest it, and slice thin against the grain, and the flank becomes one of the most flavorful and reliable steaks you can cook, at a fraction of the price of the tender cuts.

Flank around the world

The flank steak has earned a place in kitchens across the globe precisely because it is flavorful, lean, and quick to cook. In Mexican cooking it is the heart of fajitas and carne asada. In Chinese kitchens, thinly sliced, it is a staple of fast, high-heat stir-fries. Italian cooks roll and stuff it as braciole, and across Latin America it turns up grilled and sliced over salads and rice. That worldwide popularity is a testament to how much flavor the cut delivers for the money, and every one of those traditions relies on the same two rules: cook it fast to medium-rare, and slice it thin against the grain.