The burger will be available for one-day on 9 October at the chain’s Covent Garden branch at a cost of £7.25. Only 500 will be produced.
Named after the famous English oak tree in Sherwood Forest, the burger combines Abderdeen Angus beef patty, fresh shallots, blue Beauvale cheese, pine and a forest-inspired ketchup made of seasonal Penny Bun mushrooms, along with a smoked mayonnaise.
Bains paid homage to the burger’s roots in Sherwood Forest’s mythology.
“The Major Oak is a nod to Nottinghamshire's historic Sherwood Forest made famous by Robin Hood,” he said.
“Together with Shake Shack, we’re commemorating my home county, and we’ve created a remarkable, one-of-a-kind burger full of flavour inspired by this historic woodland.”
Shake Shack’s culinary director, Mark Rosati, praised Bains.
“Sat is incredibly community-minded and displays an infectious sense of local pride by using hometown ingredients,” he said.
“I’m thrilled to work with one of the UK’s most brilliant chefs to bring the unique tastes of his beloved East Midlands to Londoners for one very special day. The Major Oak burger is the perfect blend of classic American comfort cuisine reimagined through the masterful touch that Sat brings to this collaboration.”