From MyRecipes.com…
Skirt steak is one of those cuts that is either in your regular rotation, or not on your radar at all. If you know about it, and how to cook it, you know that it is one of the most delicious cuts imaginable, full of deep meaty flavor, and when handled properly, a terrific texture.
It is also one of the healthier cuts of beef you can choose, making it an ideal cut for those who want to eat beef but keep things on the lighter side.
What is skirt steak?
If you are not familiar with skirt steak, now is the time to get to know it. An affordable cut of meat, the skirt comes from the plate section of the cow, along the front part of the belly, and is a muscle that goes around the diaphragm, hence the “skirt” name. It is a long, narrow muscle, and usually ranges from about a half an inch to three-quarters of an inch thick, making it a cut that is super fast to cook. It does best with a fast cook, so it is ideal for grilling, stovetop cooking, and stir-frying.