Understanding Primal Cuts
A side of beef is broken down into large sections called primal cuts, which are then further divided into the retail cuts you see at the butcher counter. Understanding the primal cuts tells you a lot about a piece of meat before you even taste it, because location on the animal determines tenderness, flavor, and fat content.
The basic principle is simple: muscles that work harder are tougher but more flavorful. The legs, shoulders, and chest support the animal's weight and are constantly moving, so they develop dense connective tissue and collagen. These cuts need slow cooking to break down that tissue into gelatin. Conversely, muscles along the back (the loin) do very little work, so they are naturally tender but have milder beef flavor.
Here are the eight primal cuts, from front to back and top to bottom.
Chuck (Shoulder)
The chuck comes from the shoulder and neck area and makes up roughly 26% of the carcass weight. It is well-exercised, full of connective tissue, and loaded with beefy flavor. Chuck is the workhorse of budget beef cooking.
Popular Retail Cuts
Chuck Roast (Shoulder Roast): The quintessential pot roast cut. Tough when cooked fast, but meltingly tender when braised at 300F for 3-4 hours. Look for good marbling throughout.
Flat Iron Steak: Cut from the top blade, the flat iron is remarkably tender - second only to the tenderloin according to university meat science studies. It has a rich, beefy flavor and works beautifully on a hot grill to medium-rare. This cut was essentially "invented" by meat scientists at the University of Nebraska who figured out how to remove the tough connective tissue seam that runs through the top blade.
Denver Steak: Cut from the serratus ventralis muscle under the shoulder blade. Well-marbled, tender enough for grilling, and packed with flavor. It is still relatively unknown, which means it is often priced lower than comparable quality steaks.
Best cooking methods: Braising, slow cooking, sous vide (for steaks), grilling (flat iron, Denver)
Rib
The rib primal runs from the 6th through the 12th rib and gives us some of the most prized (and expensive) cuts. This area does relatively little work, so the meat is naturally tender with generous intramuscular fat (marbling).
Popular Retail Cuts
Ribeye Steak: The king of steaks for many people. Cut from the longissimus dorsi muscle with the characteristic "eye" of meat surrounded by a cap of fat (the spinalis, which many consider the single best-tasting piece of beef on the entire animal). Generous marbling means incredible juiciness and flavor.
Prime Rib (Standing Rib Roast): This is essentially a whole section of bone-in ribeyes cooked as a roast. It is the centerpiece of holiday dinners. Roast it at 250F until the center hits 120F, then rest for 30 minutes. The temperature will carry over to a perfect medium-rare.
Back Ribs (Beef Ribs): These are the bones cut away from the ribeye. They have less meat than short ribs but cook faster and are great on the grill with a dry rub.
Best cooking methods: Grilling (ribeye), roasting (prime rib), smoking (back ribs)
Loin (Short Loin and Sirloin)
The loin runs along the upper back and is divided into the short loin (front) and the sirloin (rear). This is where you find the most tender and most expensive steakhouse cuts.
Short Loin Cuts
New York Strip (Kansas City Strip): Cut from the longissimus muscle, the strip steak has a firmer texture than ribeye with a bold, concentrated beef flavor. A thick fat cap on one edge adds richness. This is the steakhouse standard.
Tenderloin (Filet Mignon): The most tender cut of beef, period. It comes from the psoas major muscle, which does virtually no work. A filet mignon is incredibly soft and buttery but has less beefy flavor than fattier cuts. It is at its best cooked to medium-rare and benefits from a hard sear.
T-Bone: A cross-section that includes both a New York strip and a small piece of tenderloin, separated by a T-shaped bone. The bone adds flavor during cooking.
Porterhouse: Essentially a T-bone with a larger tenderloin portion. USDA requires the tenderloin portion to be at least 1.25 inches wide measured from the bone to qualify as a porterhouse.
Sirloin Cuts
Top Sirloin: A leaner, more affordable steak with good beef flavor. Not as tender as the short loin cuts, but a solid everyday grilling steak. Buy it thick (at least 1.5 inches) for the best results.
Tri-Tip: A triangular muscle from the bottom sirloin that is extremely popular on the West Coast (particularly Santa Maria, California). It has a distinctive grain that changes direction, making it important to slice against the grain. Grill it over high heat to medium-rare, rest it, and slice thin.
Best cooking methods: Grilling (all steaks), roasting (whole tenderloin, tri-tip), pan-searing
Round (Rear Leg)
The round comes from the rear leg. These are heavily exercised muscles: lean, tough, and relatively inexpensive. Round cuts are challenging to cook well because they lack fat and collagen.
Popular Retail Cuts
Eye of Round: A football-shaped roast that is very lean. Best roasted at low temperature or sliced thin for sandwiches (this is what most deli roast beef is made from). Do not cook it past medium or it becomes unpleasantly dry.
Bottom Round: Tougher than eye of round. Best used for braising, pot roast, or sliced thin against the grain. This cut is also commonly used for beef jerky because its lean composition dries well.
Top Round (London Broil): Slightly more tender than the others. Often marinated aggressively, broiled or grilled hot and fast, and sliced very thin against the grain.
Best cooking methods: Braising, roasting low and slow, slicing thin for sandwiches, jerky
Brisket
The brisket comes from the chest of the animal and supports roughly 60% of the cow's body weight. It is one of the hardest-working muscles and is loaded with tough connective tissue and collagen. This makes it terrible for fast cooking and absolutely perfect for smoking.
The Two Parts
The Flat: The leaner, thinner portion of the brisket. It has a uniform thickness and a fat cap on one side. Competition brisket slices come from the flat.
The Point (Deckle): The thicker, fattier portion that sits on top of the flat. It has heavy marbling and more connective tissue. The point is what gets chopped or cubed for burnt ends, one of the great delicacies of barbecue.
A whole, untrimmed brisket (called a "packer" brisket) includes both the flat and the point and typically weighs 12-18 pounds. After trimming and cooking, you will lose about 30-40% to fat trimming, moisture loss, and shrinkage.
Best cooking methods: Smoking (225-250F for 12-16 hours), braising
Plate
The plate is located below the rib primal on the belly side of the animal. It is fatty and tough, producing some intensely flavorful cuts.
Popular Retail Cuts
Short Ribs: Incredibly rich and beefy. Available in two styles: English cut (cut between the ribs into individual bones) and flanken cut (sliced across the bones into thin strips, popular in Korean BBQ as kalbi). Braised short ribs are one of the most luxurious dishes in beef cookery.
Skirt Steak: The diaphragm muscle, and the traditional cut for fajitas. It has an intense, almost mineral beef flavor and a loose grain that absorbs marinades beautifully. Cook it screaming hot and fast (2-3 minutes per side), let it rest, and slice it thin against the grain. There is an inside skirt and an outside skirt - the outside skirt is thicker, more tender, and harder to find at retail because most are bought by restaurants.
Best cooking methods: Braising (short ribs), high-heat grilling (skirt steak), Korean BBQ (flanken ribs)
Flank
The flank comes from the abdominal muscles below the loin. There is only one cut from this primal worth discussing.
Flank Steak: Similar to skirt steak but leaner and with a tighter grain. It is a flat, thin muscle that is best cooked hot and fast to medium-rare (130-135F internal), rested for 10 minutes, and sliced thin against the grain. Cutting with the grain results in a tough, stringy eating experience. Against the grain, it is tender and delicious. Flank steak takes marinades well and is classic for stir-fry, London broil, and carne asada.
Best cooking methods: High-heat grilling, broiling, stir-fry
Shank
The shank comes from the leg, both front and rear. It is the toughest cut on the animal, crossed with tendons and sinew. But when braised for hours, those connective tissues melt into rich, unctuous gelatin. Osso buco, one of the great dishes of Italian cuisine, is made from cross-cut veal shanks. Beef shanks work beautifully in stews and bone broth.
Best cooking methods: Braising, stewing, bone broth
USDA Beef Grading
When you see "USDA Choice" or "USDA Prime" on a label, that refers to a quality grade based primarily on marbling (intramuscular fat) in the ribeye muscle, assessed between the 12th and 13th rib.
Prime: The top 2-3% of all beef. Abundant marbling throughout. This is what high-end steakhouses serve. Increasingly available at retail through Costco and specialty butchers.
Choice: The grade most of us buy. Good marbling, solid quality. There is a wide range within Choice - the upper end approaches Prime quality, while the lower end can be fairly lean.
Select: Lean with minimal marbling. Less juicy and flavorful than Choice. Often found at discount grocery stores. Select can be fine for braising (where added moisture helps) but is a poor choice for grilling steaks.
Below Select are Standard and Commercial grades, which are typically used for ground beef and processed products and are rarely labeled.
A Quick Note on Wagyu
Wagyu refers to specific Japanese cattle breeds (primarily Japanese Black) that are genetically predisposed to extraordinary intramuscular marbling. Authentic Japanese A5 Wagyu is the highest grade and features marbling so dense that the meat appears nearly white with red streaks. It is incredibly rich and is traditionally eaten in small portions.
American Wagyu is a cross between Wagyu and domestic breeds (usually Angus). It has more marbling than conventional beef but less than purebred Japanese Wagyu. It is an excellent middle ground: more affordable and available, with a noticeably richer eating experience than standard USDA Prime.
Buying Tips
At the butcher counter: Do not be shy about asking your butcher to cut something to your specifications. Want a 2-inch-thick ribeye? Ask for it. Want the flat iron with the connective seam removed? They can do that. A good butcher is a resource - use them.
At the grocery store: Look at the sell-by date and choose the package with the longest window. Examine the marbling by looking at the meat straight on. Color should be bright cherry red (or dark, purplish red if the meat is in vacuum-sealed packaging, which is normal). Avoid any packages with excessive liquid in the tray, which can indicate freeze-thaw cycles.
The best value cuts for grilling that your neighbors have not discovered yet: flat iron, Denver steak, hanger steak, and tri-tip. These deliver remarkable quality for a fraction of the price of ribeye and strip.