Flank steak is one of the most flavor-forward cuts we carry and one of the most consistently mishandled in home kitchens. The mistakes are always the same: cooked past medium, marinated in something too sweet, and sliced with the grain instead of against it. Here is how to avoid all three.
What Flank Steak Is
Flank comes from the abdominal muscle — a hard-working muscle that develops long, visible muscle fibers and a lean fat profile. It is not heavily marbled like ribeye, but it has a pronounced, deep beef flavor that more expensive cuts sometimes lack. It is also one of the most affordable steaks on the animal.
The Marinade
Because flank is lean and has a coarse grain, it benefits from acid in a marinade — acid breaks down some of the surface fibers and helps tenderize the outer layers. A basic formula that works:
- 3 tablespoons soy sauce or Worcestershire
- 2 tablespoons lime juice or red wine vinegar
- 3 cloves garlic, grated or pressed
- 2 tablespoons olive oil or beef tallow (melted)
- 1 teaspoon cumin, optional but good
Marinate for 2–4 hours. Longer than 6 hours and the acid starts to break down the surface texture in a way that reads as mushy. Overnight marinades with high acid are too long for flank.
The Cook
High heat. Fast. Flank steak should hit a screaming hot grill or cast iron and spend no more than 3–4 minutes per side. The goal is medium rare to medium — 130 to 140°F internal. Past medium, the lean muscle fibers contract and the steak goes from tender to chewy in a matter of degrees.
Rest for 5 minutes after pulling from heat.
The Slice — This Is the Most Important Part
Look at a raw flank steak and you can see the grain running lengthwise down the cut. If you slice with the grain, each piece contains long muscle fibers that require significant chewing. If you slice against the grain — perpendicular to those fiber lines — each slice cuts through short sections of fiber and becomes dramatically more tender.
Slice against the grain, at a slight diagonal, in thin strips no wider than a half inch. This single adjustment transforms flank steak from a tough cut to a genuinely enjoyable one.
Applications
Fajitas are the most common use and the most appropriate — the thin sliced, heavily seasoned beef was designed for this format. But flank also works in stir fry, beef salads, grain bowls, and sliced over rice. Any application that benefits from thin, well-seasoned beef strips is a flank steak application.
Ours is available in the Steaks collection and the Individual Cuts collection.