Right now and through June 15, the three Philadelphia-area Shake Shack locations are serving a carbonara burger. Conceived in collaboration with Marc Vetri, $1 from every burger sold will go directly to the Vetri Foundation for Children. Here’s more on the collaboration:

“Our Culinary Director Mark Rosati and acclaimed Philadelphia chef Marc Vetri have yoked their toques to come up with a pretty epic collaborative burger, which will only be available at the three Philly area Shacks — University City, Center City, and King of Prussia — from June 6-15.

It’s called the Carbonara Burger, and it consists of our 100% all-natural Pat LaFrieda Angus beef patty topped with crispy bacon, pecorino cheese, a sunny-side-up egg, and black pepper ($6.75).

$1 from every Carbonara Burger sold will go to The Vetri Foundation to help further its mission to help children experience healthy living and eating.” –Phoodie

“In celebration of The Vetri Foundation’s upcoming Great Chefs Event on June 10th, the three local Shake Shack locations (Center CityUniversity CityKing of Prussia) will offer the Carbonara Burger from June 6th to June 15th.

The Carbonara Burger starts with the standard Shake Shack burger meat from Pat La Frieda and is topped with bacon, pecorino cheese, black pepper and a sunny side up egg.” –Foobooz

“The burger is also a celebration of the upcoming Great Chefs Event, The Vetri Foundation and Alex’s Lemonade Stand’s fundraising event for childhood cancer.

Pair the burger with hand-cut fries and a sweet concrete and call it a day.” –uwishunu