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Reese's Peanut Butter Cup Shake at Shake Shack — launch date and LTO window
Vanilla frozen custard blended with Reese's Creamy Peanut Butter and fudge sauce, poured into a cup lined with a crackable dark chocolate shell, and topped with whipped cream, Reese's Mini Peanut Butter Cups, and chopped Reese's Pieces.
Key data
Shake Shack launched the Reese's Peanut Butter Cup Shake, announced September 3, 2026, priced at $9.99. It is a limited-time offer in the shakes & frozen category, available nationwide. This record is backed by 2 sources and 2 independent outlets.
The facts
| Field | Value |
|---|---|
| Chain | Shake Shack |
| Launch type | Limited-time offer |
| Announced | September 3, 2026 |
| Available from | Not stated |
| Available until | While supplies last |
| Price | $9.99 |
| Markets | Nationwide |
| Channels | Not stated |
| Category | Shakes & frozen |
Sources
Every published launch carries at least one source with a quote from the original announcement.
- Consumer mediaSeptember 6, 2026
“The chain’s new Reese’s Peanut Butter Cup Shake is now available nationwide for a limited time”
delish.com ↗ - Consumer mediaSeptember 3, 2026
“Ahead of Halloween, Shake Shack has launched its new Reese's Peanut Butter Cup Shake as a limited-time flavor at locations across the US.”
brandeating.com ↗
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