To slice corned beef, let it rest after cooking, find the direction of the grain, and cut thin slices straight across it, about a quarter inch thick or a little less. Across the grain, each slice is made of short fibers and stays tender. Along the grain, the same meat comes apart in long, stringy strands. For sandwiches, chill the cooked beef first and slice it even thinner.

Corned beef is usually brisket, a cut with long, strong muscle fibers. That is why the direction of the knife matters so much more here than on a tender steak.

Know what you bought

In the US, corned beef is usually brisket cured in a seasoned brine, though round is sometimes used. The name comes from the large-grained rock salt, called “corns” of salt, used to treat the meat.

At the store, a corned beef brisket comes in two cuts:

  • The flat cut, also called the first cut, is the leaner part of the brisket. It is more uniform in shape, which makes it easier to slice neatly after cooking. If you want even slices for a platter or sandwiches, buy the flat.
  • The point cut, also called the second cut or deckle, has more fat and marbling. It tends to shred more readily, which makes it rich and tender but harder to slice into neat pieces.

Both slice the same way. The point needs a little more attention to the grain, because it is a thicker, more irregular piece.

Corned beef stays pink after cooking. The cure contains nitrite, which fixes the pigment in the meat, so the pink color is not a sign that it is undercooked. Use a thermometer, not the color, to tell when it is done.

Mark the grain before cooking

The grain is the direction the muscle fibers run, and on raw brisket it shows clearly as fine parallel lines across the surface. After hours of simmering, the surface darkens and softens, and those lines can be hard to see.

Before the beef goes into the pot, look at the grain and cut a small notch from one corner across it, or take a photo with your phone. When the meat comes out, the notch shows you which way to slice.

Cook it, then rest it

Corned beef is safe once it reaches at least 145°F inside, measured with a food thermometer, and like any whole cut of beef it should rest for at least 3 minutes before you carve it. For tender slices, keep simmering it gently well past that point, until a fork slides in with no resistance.

Let it rest on the board, loosely tented with foil, while the vegetables finish in the cooking liquid. A rest lets the meat firm up a little, and firmer meat slices more cleanly.

How to slice it hot, for dinner

  1. Move the rested beef to the board, fat side up.
  2. Trim the fat cap if it is thick, leaving a thin layer for flavor.
  3. Find the grain or your notch, and turn the meat so the knife will cross the lines at a right angle.
  4. Slice about a quarter inch thick, using long, smooth strokes with a long, sharp knife. Let the knife do the work rather than pressing down, which squeezes out juice and tears soft meat.
  5. Check the grain as you go. If the lines change direction partway through the piece, turn the meat so you are still cutting across them.
  6. Fan the slices on a warm platter and spoon a little of the cooking liquid over them to keep them moist.

Slice only what the table will eat in the first round. Unsliced corned beef stays juicier than slices left sitting out.

How to slice it cold, for sandwiches

For a Reuben or a deli-style sandwich, thin slices matter more than anything, and cold meat slices thinnest.

Cut the cooked beef into a few large pieces so it cools faster, refrigerate it in shallow containers within 2 hours of cooking, and leave it overnight. The next day, the meat is firm enough to cut slices an eighth of an inch thick or thinner, still across the grain. Warm the slices in a covered pan with a spoonful of the cooking liquid, or stack them cold on rye.

The St. Patrick’s Day table

In the US, corned beef is closely tied to St. Patrick’s Day, which falls on March 17, 2027. The pairing grew out of Irish-American culture; corned beef is not the national dish of Ireland. Served with cabbage, carrots and potatoes cooked in the same pot, it is one of the simplest holiday dinners to put on a table.

Cut the cabbage into wedges through the core so each wedge holds together in the pot. If you would rather serve it raw on the side, how to shred cabbage for coleslaw covers that knife work.

The board and the knife

A whole corned beef releases liquid as it rests and as you cut it. The WONAMU. acacia cutting board is 12 by 9 inches with a perimeter juice groove that holds those juices on the board instead of letting them run onto the counter.

Acacia is denser and heavier than bamboo, so the board stays steady under a long carving knife. A damp towel underneath adds grip. What a juice groove is for explains how to make the most of one.

The same thinking about grain applies to fresh brisket; how to slice brisket covers the flat and the point in more detail.

Leftovers

Refrigerate leftover corned beef within 2 hours of cooking and use it within 3 to 4 days, or wrap it well and freeze it. Reheat leftovers to 165°F. Leftover slices make hash, sandwiches and a fine breakfast with eggs.

After carving, wash the board with hot water and a little dish soap, rinse and dry it standing on edge. How to care for an acacia cutting board covers the rest of the routine.

The short version

Mark the grain on the raw brisket with a notch. Cook it to at least 145°F, then simmer until fork-tender, and rest it before carving.

Slice across the grain about a quarter inch thick for dinner, turning the meat whenever the grain shifts. For sandwiches, chill it overnight and slice it thinner. The pink color is the cure, not a sign of undercooking.

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WONAMU. makes an acacia cutting board designed for daily prep, 12 × 9 inches, acacia, with a perimeter juice groove. Available on Amazon.

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