beef Plate
Skirt Steak
Sold under one name. It is two different steaks at two different prices.
Skirt steak is the diaphragm — and it is two cuts under one label. Outside skirt is thicker, better marbled and more expensive; inside skirt is thinner and chewier, and it is what usually reaches retail. Both are heavily grained and cook in about two minutes a side. This is the original fajita and arrachera cut.
Buy it if
You are cooking fajitas, or you want the most beef flavor per dollar and do not mind a chew.
Inside and outside are not the same steak. Outside skirt is the diaphragm muscle proper, sold with its membrane peeled off — thicker, more evenly shaped, better marbled, and the one steakhouses and taquerias want. Inside skirt comes from the abdominal-wall side, runs wider and thinner, and is noticeably chewier. Retail usually means inside skirt, and packages usually do not say which one they are. If it is labelled only 'skirt steak' and priced ordinarily, assume inside — and slice it even thinner to make up the difference.
Why it tastes the way it does. The diaphragm never stops working; it moves with every breath the animal takes. That constant use is what gives it coarse fibers and the deep, iron-heavy flavor that lets a cheap cut outperform far more expensive steaks on taste and lose to them on texture. You are trading tenderness for flavor, knowingly.
Cut it into lengths before you slice it. The fibers run across the narrow width of the strip, not down its length — so slicing a whole long skirt end to end gives you ropes. Cut the piece crosswise into four- or five-inch lengths first, then turn each one and slice it thin at a right angle to the fibers.
Where it comes from on the animal
| Species | beef |
|---|---|
| Primal | Plate |
| Subprimal | diaphragm (inside + outside skirt) |
What else it’s called
How to cook Skirt Steak
| Best methods | Grill Pan sear Broil |
|---|---|
| Cook to | Hot and fast to medium-rare, 130–135°F. Rest briefly, cut into short lengths, then slice thin across the grain. |
The grain runs across a skirt in ropes you can see from a foot away, and that visible grain is the whole game — cut along it and every bite is a rubber band, cut across it and the same steak is tender. It's only about half an inch thick, so it wants the hottest surface you own for roughly two minutes a side; there is no version of a moderate fire that does anything but grey it out. The loose grain also takes marinade faster than any other steak, so an hour does the job and a citrus-heavy soak overnight turns the surface mushy.
Skirt Steak vs Flank Steak
Both are thin, coarse-grained belly steaks cooked hot and fast and sliced across the grain. Skirt is fattier and more intensely beefy; flank is leaner and thicker, so it takes longer and slices more neatly.
| Skirt Steak | Flank Steak | |
|---|---|---|
| Primal | Plate | Flank |
| Thickness | About half an inch | About an inch |
| Fat | Moderate | Lean |
| Marbling | Moderate | Light |
| Under the label | Two steaks — outside is thicker and better marbled, inside is what usually reaches retail | One muscle per side |
| Best method | Grill or Pan-sear | Grill |
Full Skirt Steak vs Flank Steak comparison →
If Skirt Steak is sold out
Cooks like
Flank Steak
Leaner and thicker, with the same coarse grain — sear it hot and slice thin, but give it longer and watch the edges.
Cooks like
Hanger Steak
The other diaphragm cut, and the closest thing on flavor — loose-grained and intensely beefy, seared hot and fast.
Cooks like
Bison Skirt Steak
Same cut, leaner animal. Hot, fast, sliced thin — and pull it a little earlier.
Substitute
Sirloin Flap (Bavette)
Does the same job in fajitas and stir-fries, but it is thicker — easier to bring off the fire properly rare.
Common questions
Why is skirt the fajita cut?
It was the cheap end of the animal that ranch hands in the Rio Grande Valley were given as part of their pay, and the shape gave it its name — faja is Spanish for belt or sash, and the steak is a long thin band. Arrachera is the same cut in Mexico, usually marinated.
Is skirt the same as hanger steak?
They are neighbours, not the same. Both come off the diaphragm and both taste deeply of beef, but hanger is a single unpaired muscle — one per animal, which is why it is scarce and priced accordingly. Skirt comes off the same region in far greater quantity.
Should I marinate it?
Not for tenderness — nothing you can marinate with will meaningfully soften fibers this coarse, and slicing across the grain will. Marinate for flavor if you want to; the open grain takes it on fast.
Can I use flank instead?
For most recipes yes, but flank is leaner and considerably thicker, so it takes longer and forgives less at the edges. Skirt is fattier and tastes more intensely of beef; flank slices more neatly. Bavette sits between the two.
