How to make seared Wagyu nigiri

Aburi nigiri is a slice of raw topping over sushi rice, flamed on top just before it's served. With Japanese Wagyu, the torch melts the fat at the surface and leaves the center cool. The knife work happens before guests sit down, and each piece takes seconds at service.

What is aburi Wagyu nigiri?

Aburi means "to sear": the surface is grilled lightly and the inside stays raw ^[1]. Sushi chefs use it mostly on fatty toppings like salmon and tuna, where the flame brings out aroma and melts fat ^[1]. Fatty tuna can be too rich for the vinegared rice on its own, which is one reason chefs sear it ^[2]. Marbled Wagyu fits the same logic.

Which cut of Wagyu is best for nigiri?

Thin slices from the loin or rib. The torch is there to render surface fat, so a cut with fat to render and an even shape to trim works best. Sliced from a steak, in our order of preference:

Any of our fattier yakiniku slices also make excellent nigiri, with the knife work already done. They're cut ¼″, a little thick for traditional nigiri, but they still work well: trim each slice to about 1″ wide and torch it a little longer so it warms through.

Lean cuts like top round have little fat, so the torch only browns them.

Should you use A5 Wagyu for nigiri?

You don't have to. A5 needs marbling of BMS 8 or higher, and it's the most common grade in Japan. Takemitsu-chan, the cow in our current drop, graded A4 with BMS 6, which eats with more beef character and less richness per bite (what the grades mean). Chefs sear fatty toppings partly to keep them from overwhelming the rice ^[2], and an A4 slice starts with less fat to tame, so the short end of the torch times below is usually enough.

How do you cut Wagyu for nigiri?

1. Thaw it in the vacuum pack in the fridge overnight (thawing), then pat it dry.
2. Firm it. Set it on a tray in the freezer for 20–30 minutes, until the outside is firm and the center still gives a little.
3. Trim the fat cap and any hard edge, and square the steak off.
4. Slice straight down across the short side, ⅛″ to 3/16″ apart, in one long draw of a yanagiba or slicer. Wipe the blade between cuts.

A strip steak is cut across the grain, so its fibers run straight through the 1″ thickness, face to face. Sliced this way, each piece comes off 1″ wide, the right width for nigiri, with the fibers running across it and none longer than 1″. Trim each slice to 3″ long.

A 3″ × 1″ slice ⅛″ thick is about 6 cubic centimeters, roughly 6 g of beef; at 3/16″ it's about 9 g. Hold the slices covered on a chilled tray in the fridge.

For the client's budget: at $152/lb, the strip works out to about 34¢ a gram. A 7 g slice is about $2.35 of beef, or about $2.50 once you allow for the 5–10% a strip usually loses to its fat cap. The trim is good in fried rice, or you can render the fat cap as tallow.

How much rice goes under each piece?

12–15 g. There's no industry standard; each restaurant sets its own, and the mainstream today is 10–15 g a piece in central Tokyo and 15–20 g in regional areas ^[3]. A rich Wagyu slice suits the smaller end. One gō of rice (150 g raw) cooks to 300–330 g ^[3], about 20–25 pieces at 13–15 g. Hold the rice near body temperature and the beef cold, the way sushi counters do ^[2].

How do you torch Wagyu nigiri?

Form the piece with a dab of wasabi between rice and beef, set it on a heatproof board, and torch the top.

Light a butane torch away from the food, then hold the flame a few inches off and keep it moving end to end for 3–5 seconds. Stop when the fat glistens and the edges just turn golden, before the slice shrinks or drips. A ¼″ yakiniku slice needs a few seconds more to warm through.

Edomae-style masters often disapprove of handheld gas burners for the faint odor they leave, and charcoal or a hot iron plate also work ^[1]. Serve each piece as it's torched; Sushi University's advice is to eat nigiri within 5 seconds of it being served ^[2].

How do you finish and serve it?

A few flakes of salt or a light brush of nikiri-shoyu is plenty; we'd pick one, not both. Sushi chefs put the wasabi between the rice and the topping ^[2], so tell guests there's no need to dip.

Two pieces a guest makes a course. For 8 guests that's 16 pieces: about 110 g of sliced beef and 210 g of rice, so one strip covers it with room for trim.

Is seared Wagyu nigiri safe to eat?

It doesn't meet USDA's guideline, and the host should hear that before the menu is set. FSIS recommends cooking beef steaks and roasts to 145ºF with at least a 3-minute rest ^[4]. A few seconds of torch browns the top of the slice; the center and the side on the rice stay raw.

FSIS explains where the risk sits. In an intact steak or roast, E. coli is limited to the exterior surface, and grinding or mechanical tenderizing can carry it inside ^[5]. So nigiri should come from a whole steak, never from ground or tenderized beef. Searing every face of the steak before slicing addresses the surface, but it doesn't bring the piece to 145ºF. Freezing doesn't help either: it stops most bacteria from growing without killing them ^[7].

Keep the sliced beef at 40ºF or below until it's torched, and never leave it out more than 2 hours, or 1 hour above 90ºF ^[6]. It's worth telling the host that raw or undercooked meat may increase the risk of foodborne illness, especially for young children, older adults, pregnant guests and anyone with a weakened immune system, and cooking a few slices through in a hot pan for anyone who'd rather.