SeasonalWhile supplies last
Sonic Drive-In · Smoked Gouda and Bacon Sonic Smasher
A burger made with hand-smashed Angus patties topped with smoked gouda, crispy bacon, and black pepper aioli, available in double or triple versions.
Limited-time offerWhile supplies last$14.79
Black Truffle Shack Stack at Shake Shack — launch date and LTO window
A quarter-pound Angus beef patty with fontina cheese, a fried portobello mushroom stuffed with muenster and cheddar cheeses, and black truffle sauce made with imported truffle oil, on a toasted potato bun.
Key data
Shake Shack launched the Black Truffle Shack Stack, announced September 29, 2026, available from September 29, 2026, priced at $14.79. It is a limited-time offer in the burgers category, available nationwide. This record is backed by 7 sources and 5 independent outlets.
The facts
| Field | Value |
|---|---|
| Chain | Shake Shack |
| Launch type | Limited-time offer |
| Announced | September 29, 2026 |
| Available from | September 29, 2026 |
| Available until | While supplies last |
| Price | $14.79 |
| Markets | Nationwide |
| Channels | Not stated |
| Category | Burgers |
Sources
Every published launch carries at least one source with a quote from the original announcement.
- Consumer mediaOctober 10, 2026
“This elite sandwich launched 29, September, 2026, and is available at Shake Shack locations for an unspecified limited time for $14.79.”
foodrepublic.com ↗ - Trade mediaOctober 4, 2026
“a Black Truffle Shack Stack layering the burger and portobello”
restaurantbusinessonline.com ↗ - Consumer mediaSeptember 30, 2026
“Although this burger still had the gigantic fried mushroom component, this one actually tasted much better because, well, it had an actual burger patty on it.”
sporked.com ↗ - Consumer mediaSeptember 30, 2026
“The Black Truffle menu is back at Shake Shack for a limited time, along with new Mac & Cheese Bites”
brandeating.com ↗ - Trade mediaSeptember 30, 2026
“Black Truffle Shack Stack: An Angus beef patty topped with fontina cheese, a crisp-fried portobello mushroom filled with muenster and cheddar cheeses, and black truffle sauce on a toasted potato bun.”
qsrmagazine.com ↗ - Trade mediaSeptember 30, 2026
“Black Truffle Shack Stack: An Angus beef patty topped with fontina cheese, a crisp-fried portobello mushroom filled with muenster and cheddar cheeses, and black truffle sauce on a toasted potato bun.”
qsrmagazine.com ↗ - Consumer mediaSeptember 29, 2026
“Black Truffle Shack Stack: A quarter-pound Angus beef burger that includes fontina cheese, a fried portobello mushroom filled with muenster and cheddar cheese, and black truffle sauce.”
sporked.com ↗
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