Photo: Patty & BunHoly Truffle
The indulgent one. A beef patty with black truffle mayo, sweet onion jam, Parmesan and double American cheese. The truffle is loud, the onion jam sweet and the double cheese melts through everything. It is a rich, grown-up burger that does not pretend to be subtle.
The story
Worth knowing before you order anything with truffle on it anywhere: most of what tastes like truffle in a restaurant is not truffle. Truffle oil is usually a neutral oil flavoured with 2,4-dithiapentane, a compound made in a laboratory, because real truffle loses its aroma within days and never survives heat. That is not automatically a swindle — the synthetic version is a real and powerful smell — but it is why a truffle burger can exist at this price and a fresh black truffle cannot.
What’s inside
Make it at home
There is no copycat of the Holy Truffle yet. Until there is, these recipes on the site come closest to it, judged by what goes into the bun.
- Shares beef, truffle and cheese
Mushroom Swiss Smash Burgers with Truffle Sauce - Shares beef, cheese and a double stack
Whopper (Copycat) - Shares beef, cheese and a double stack
McDonald's Daily Double (Copycat) - Shares beef, cheese and a double stack
Big Beef Blopper
Similar burgers at other chains
Built around the same things as the Holy Truffle.- Rekas Burgers · beef, truffle, cheese and a double stack
King - VICIO · beef, truffle, cheese and a double stack
SignatureCheeseburger Trufada - Umami Burger · beef, truffle and cheese
Truffle Burger - Black Star Burger · beef, truffle, cheese and a double stack
Mushroom Smash
More from Patty & Bun
About Patty & Bun
Patty & Bun grew out of London’s street-food boom in the early 2010s, starting as pop-ups before opening its first permanent restaurant off Oxford Street in 2012. It became one of the places that convinced Londoners a burger could be worth queuing for, at a time when the city was waking up to American-style burger joints.
A handful of restaurants across London and a few other UK cities.
Not affiliated with Patty & Bun. Trademarks belong to their owners. The photo is credited under it and is used to illustrate this menu item; it comes down on request.



