Truffle Burger: Wagyu Patty and Truffle Aioli

A good truffle burger needs a browned patty, a toasted bun and enough truffle in the sauce to taste it. This version makes two burgers with Gruyère and a simple truffle aioli made from ready-made mayonnaise. The patties are cooked thoroughly, not served medium.

Serves: 2. Beef mince: 250g. Allow: about 30 minutes. Equipment: a heavy frying pan and a clean food thermometer suitable for checking the centre of a burger.

What can you buy from Beleaev for this recipe?

Beleaev does not currently offer the Wagyu mince or burger patties used in this recipe. Buy suitable mince separately; a Japanese A5 steak is not a burger patty and is not being offered as one here.

The matching Beleaev ingredient is Périgord black truffles, frozen, 100g. The recipe uses 10g, finely grated or diced from frozen and gently warmed before mixing into the sauce. This frozen product is a cooking truffle, not a fresh truffle for raw shavings. The card below is for the truffles only.

Ingredients for two burgers

For the burgers

• 250g Wagyu beef mince or ordinary beef mince, approximately 20% fat, bought separately
• 2 burger buns, brioche or another firm bun
• 60g Gruyère, thinly sliced
• 2 lettuce leaves, washed and dried
• 15g unsalted butter, for the buns
• 1 teaspoon neutral oil, for the pan
• Sea salt and freshly ground black pepper

For the truffle aioli

• 10g frozen Périgord black truffle, finely grated or diced from frozen
• 5g unsalted butter
• 4 tablespoons ready-made mayonnaise
• ½ small garlic clove, finely grated
• 1 teaspoon lemon juice, then more to taste

Allergen note: buns commonly contain wheat and may contain egg, milk or sesame; Gruyère and butter contain milk; mayonnaise commonly contains egg and may contain mustard. Check the individual labels and any substitutions.

How to make truffle aioli with frozen truffle

1. Take only the required truffle portion from the freezer. Grate or finely dice it while still firm, following the pack's instructions.
2. Melt the 5g butter over low heat in a small pan. Add the truffle and warm gently for about 2–3 minutes, stirring. Do not let the butter brown.
3. Transfer to a clean bowl and let it cool before mixing with the mayonnaise, garlic and lemon juice. Taste and adjust the lemon sparingly.
4. Cover and refrigerate the sauce while preparing the burgers. Use a separate clean spoon to serve it; do not let raw mince or its juices touch the sauce.

Ready-made mayonnaise avoids adding raw egg to this home recipe. Follow its storage instructions. Frozen truffle is not a garnish to describe as freshly shaved: warming it in a small amount of butter suits the product being sold.

How to cook the burger patties safely

1. Prepare cleanly. Keep the mince chilled until you are ready to shape it. Divide into two 125g patties of even thickness, handling lightly. Make a small dimple in the centre and season.
2. Heat the pan. Warm the oil in a heavy pan over medium-high heat. Add the patties without crowding the pan.
3. Cook through. Turn regularly and adjust the heat so the outside browns without burning. Continue until the centre of each patty reaches 70°C and stays there for 2 minutes, or reaches 75°C for 30 seconds. Check through the side into the thickest part with a clean thermometer.
4. Add the cheese. Once the safe cooking endpoint is reached, place Gruyère on each patty and cover the pan briefly to melt it.
5. Toast the buns. Halve and butter the buns, then toast the cut faces in a separate pan or under the grill. Keep them away from raw-meat utensils.
6. Assemble. Spread the truffle aioli on the buns, add lettuce and the fully cooked cheeseburger patties, then close and serve immediately.

Wagyu mince needs the same thorough cooking as other beef mince. Bacteria can be mixed through a burger, so a browned outside does not make a pink centre safe. A three-minute-per-side instruction is not a reliable safety endpoint. See the Food Standards Agency's burger and minced-meat guidance.

How can you keep the burger balanced?

• Keep the sauce measured: use about 2 tablespoons per burger rather than covering the patty in extra butter.
• Toast the buns: brioche is an option, not a requirement. A firm toasted roll also works.
• Keep the filling simple: lettuce and a little acidity let the beef, cheese and truffle remain distinct.
• Use ordinary mince if preferred: the method does not require Japanese A5 beef or a costly steak put through a mincer.

If you have a whole steak rather than mince, use a steak recipe instead: Wagyu beef with truffle covers a separate whole-cut preparation. The cooking rules are not interchangeable.

Storage and preparation ahead

Follow the mince's use-by and storage instructions. If supplied frozen, thaw fully in the fridge and use within 24 hours of complete thawing, or sooner if the label requires it. Keep the fridge at 0–5°C, and store raw meat below the ready-to-eat sauce and salad.

The truffle product specifies storage at −18°C or below and use straight from frozen. Return the unused frozen portion promptly to the freezer; do not thaw the whole pack for this recipe or refreeze it after thawing. Follow the delivered label. The FSA chilling and defrosting guide explains the general handling principles.

Ordering the truffle ingredient in the UK

Beleaev's gourmet policy gives eligible UK orders placed Monday morning to Thursday morning a 1–3 business-day delivery window. Orders placed Thursday afternoon to Sunday are dispatched the following Monday. Confirm the option for your postcode at checkout and check the gourmet shipping policy before planning the meal.

Recipe questions

Can a Wagyu burger be served medium?

Not under this home recipe. Cook the mince thoroughly to the stated time-and-temperature endpoint. Intact-steak advice does not apply to burgers.

Can you shave the linked frozen truffle over the burger?

The product is intended for cooking and softens when thawed. Use it in the gently warmed truffle mixture rather than presenting it as fresh raw shavings.

Do you need brioche?

No. Choose a bun that holds the filling and toast its cut surfaces. Avoid making it wet with too much sauce.