Limited Edition Collector Blades
How to Cut Flat Iron Steak Against the Grain
How do you cut flat iron steak? After cooking, rest it for 5–10 minutes, find the direction of the muscle fibers, and slice it thin, about 1/4", across those fibers with a sharp chef's knife, angling the blade slightly for wider slices. Our pick is the Chef's Knife 8", Shogun Series, Elite ($129), an 8" chef's knife in Japanese AUS-10V core, 62+ HRC, 8–12° edge, 66-layer Damascus or hammered finish. Its thin, hard edge slices through a seared crust without squeezing out juice.
Flat iron comes from the top blade in the beef shoulder. It's well marbled and tender, and it's one of the better-value steaks at the butcher counter. Slicing it the right way makes it even more tender.
Flat iron at a glance
| Flat iron | Skirt | Flank | |
|---|---|---|---|
| Area | Shoulder (chuck) | Plate | Belly |
| Shape | Even, rectangular | Long, thin | Wide, flat |
| Grain | Fairly fine | Very coarse | Coarse, obvious |
| Slicing | Thin, across grain | Cut into sections first | Thin, on a bias |
Before cooking: check the center
The top blade has a thick line of connective tissue running down its middle. Butchers usually remove it to make flat iron steaks, but if you buy a whole top blade, cut along both sides of that line to free two flat pieces. Use the tip of a thin boning knife so you lose as little meat as possible.
Slicing steps
1. Rest. Let the cooked steak sit for 5–10 minutes so the juices settle.
2. Read the grain. Look for the thin lines running across the surface. You'll cut perpendicular to them.
3. Turn the steak. Position it so the lines run left to right in front of you.
4. Slice thin. Use long, smooth strokes about 1/4" apart. A slight angle gives wider, more tender-looking slices.
5. Serve right away. Thin slices cool quickly.
More on why this matters: why cutting against the grain makes a difference. For a similar cut, see how to cut skirt steak.
Cooking it right
Flat iron is tender enough for high-heat cooking. Pat it dry, season well, and sear it in a very hot cast-iron pan or over a hot grill. Many cooks pull it at medium-rare to medium, because the marbling keeps it juicy without overcooking. It also works well in tacos, salads and stir-fries; for those, slice it even thinner and cut long slices into bite-size pieces. If you're slicing for a crowd, a long, sharp edge lets you cut the whole steak quickly before it cools, and a cutting board with a juice groove keeps the counter clean.
Safety tips
- Work on a heavy board with a damp towel underneath so it can't slide.
- Keep your guiding hand flat and well behind the edge.
- Use long strokes rather than pressing down hard.
- Hone the edge before you start; a sharp knife needs less force and slips less.
Our picks
Chef's Knife 8", Shogun Series, Elite ($129). Spec sheet: Japanese AUS-10V core, 62+ HRC, 8–12° edge, 66-layer Damascus or hammered finish. A sharp, thin 8" chef knife for steak night.
Chef's Knife 8", Gladiator Series, ELITE, NSF Certified ($79). Spec sheet: German X50CrMoV15 steel, 54–56 HRC, 16–18° edge, NSF certified. A tough German-steel chef knife at a lower price.
FAQ
What's the best knife to cut flat iron steak?
A sharp 8" chef's knife. The Dalstrong Shogun Series 8" Chef Knife ($129) has a thin AUS-10V edge that slices through a crust cleanly.
Do you cut flat iron steak against the grain?
Yes. Slice thin, across the muscle fibers, for the most tender bite.
Where does flat iron steak come from?
The top blade muscle in the beef shoulder (chuck).
Should flat iron rest before slicing?
Yes, about 5–10 minutes.
What's the line through the middle of a top blade?
A band of connective tissue. Cut along both sides of it to make flat iron steaks.
