How to cook Wagyu steak comes down to its marble score: MB2 to MB3+ Wagyu cooks like a rich premium steak over high heat, while very high scores need thinner cuts and far shorter searing.
Wagyu costs more than most steaks, so nobody wants to learn on an expensive mistake.
This guide covers a marble score decision table, pan and BBQ methods, Celsius doneness, resting and seasoning.
It is written around the grass-fed Roam Wagyu we stock, with higher grades explained for context.
How to Cook Wagyu Steak: The Short Answer by Marble Score
Cook MB2 to MB3+ grass-fed Wagyu hot and fast in a pan or on the BBQ to medium rare, and keep thin cuts, very short searing and small portions for MB6 and above.
What makes Wagyu special is fat laid down inside the muscle rather than around it, so the right method depends on how much of that fat the steak carries.
| Marble score | How it eats | Heat and method | Aim for | In stock at Cost Cut Meats |
|---|---|---|---|---|
| MB2 to MB3+ | Richer than standard grass-fed beef | Hot pan or BBQ; render the fat cap, then sear | Medium rare (pull 57C) | Yes, Roam grass-fed Wagyu |
| MB4 to MB5 | Clearly marbled and rich | Hot pan, slightly shorter sear | Medium rare to medium | No, general guide |
| MB6 to MB7 | Buttery and very rich | Thinner steaks, brief hard sear | Medium rare to medium | No, general guide |
| MB8 and above, or A5 | Intensely rich, close to melting | Thin slices or cubes, seared for moments | Medium rare to medium | No, general guide |
Only the first band is stocked at Cost Cut Meats; higher grades are shown for context.
Why Marble Score Changes How You Cook Wagyu
Marble score changes the cook because the fat inside the muscle melts as the steak heats, so the more marbling a steak carries, the faster it colours, the more fat it sheds and the richer it eats.
In Australia, a marble score is set on the AUS-MEAT scale from MB0 to MB9+, based on the fat flecking visible across the cut face. Japan grades Wagyu on a Beef Marbling Standard from 1 to 12, and its top A5 grade covers BMS 8 to 12.
The grass-fed Roam Wagyu we stock is MSA graded at marble scores of MB2 to MB3+, and its product listing describes full blood Japanese genetics raised on pasture in Queensland and New South Wales. MSA grading adds a wider check, predicting eating quality for each cut rather than measuring fat alone.
Feeding matters as much as the number. Long grain feeding builds heavy marbling, while grass-fed Wagyu at MB2 to MB3+ eats cleaner and a little leaner, so it cooks like a rich premium steak rather than the melting A5 seen in online videos.
How to Pan Sear Grass-Fed Wagyu Steak
To pan sear grass-fed Wagyu, render the fat cap in a very hot pan, sear each side to a deep crust and pull the steak at 57C for medium rare.
- Pat the steaks dry and salt them just before cooking or at least 40 minutes ahead.
- Heat a cast iron pan over high heat with a thin film of oil.
- Stand porterhouse steaks on their fat edge with tongs until the fat turns golden.
- Lay them flat and sear until a deep crust forms, then turn and sear the second side.
- Add butter only if you want extra richness, since the rendered fat already bastes the steak.
- Probe the thickest part and pull at 57C for medium rare, then rest.
The grass-fed Wagyu porterhouse arrives as a whole striploin of about 3.5kg, so you can cut steaks to your preferred thickness. Thickness changes how long a steak takes to reach 57C, not the target itself, so let the probe decide.
Bone-In Wagyu Ribeye Steaks
Roam's bone-in Wagyu ribeye steaks weigh 350 to 450g each. Sear them hard, then finish over gentler heat, because the meat beside the bone cooks more slowly. Probe close to the bone without touching it.
Wagyu Tenderloin Steaks
Roam's Wagyu tenderloin, graded MB2-3+, is the leanest cut in the range, so treat it like eye fillet rather than a marbled steak. Sear every side, finish gently in the oven and pull at 57C for medium rare.
Is It Better to Grill or Pan Fry Wagyu?
Pan frying is easier for most Wagyu because the rendered fat stays in the pan to baste the steak, but a BBQ works well for MB2 to MB3+ if you control the flare-ups.
On a BBQ, melting fat drips onto the burners or coals and flares, leaving a sooty, bitter crust. Set up a hot zone and a cooler zone, and sear over the hot side with the lid up.
When the fat flares, move the steak to the cooler side until it settles. Thicker steaks can finish there with the lid down until the probe reads 57C.
A grill plate catches more fat than open bars and behaves more like a pan. The pan still wins for thin steaks, very high marble scores and anyone who wants the rendered fat for frying potatoes.
Cooking Very High Marble Score Wagyu
Very high grades, MB8 and above or Japanese A5 Wagyu, are usually cut thin or into small cubes, seared for moments in their own fat and shared in small portions. Cost Cut Meats does not stock these grades, so treat this as general guidance.
Wagyu Doneness, Resting and Seasoning
Most cooks aim for medium rare with Wagyu, pulling MB2 to MB3+ steaks at 57C so they rest to 60 to 63C, which keeps the centre juicy while giving the marbling enough heat to soften.
| Doneness | Pull from the heat | Final after resting |
|---|---|---|
| Rare | 52C | 55 to 60C |
| Medium rare | 57C | 60 to 63C |
| Medium | 62C | 65 to 70C |
| Well done | 70 to 72C | 75C |
The Food Safety Information Council recommends cooking whole cuts of beef to at least 63C and resting them for 3 minutes, and mince, sausages and rolled or stuffed roasts to 75C. Rarer beef is a personal choice that pregnant women, older people, young children and anyone with a weakened immune system are safest avoiding.
Rest steaks for about 5 minutes, loosely covered, and a little longer for thick bone-in ribeye. Salt and pepper are all the seasoning marbled beef needs, and knowing when to salt your steak matters as much as how much.
Slice across the grain and serve smaller portions than usual, since even MB2 to MB3+ Wagyu eats richer than standard grass-fed beef.
Conclusion
Match the method to the marble score: a hot pan or BBQ and medium rare for MB2 to MB3+, then thinner cuts and shorter searing as the score climbs.
Render the fat, probe the centre, rest briefly and keep the seasoning simple.
Our Wagyu range covers Roam grass-fed porterhouse, tenderloin and bone-in ribeye.
