We’re thrilled to announce the launch of our new French Onion Limited-Time Menu, rolling out exclusively on the Shack App starting September 9, and available in Shacks nationwide beginning September 12. 

This savory, fall-inspired lineup brings together Gruyère cheese, caramelized onions, and roasted garlic parmesan across burgers and fries—and introduces a long-awaited new side: our first-ever Onion Rings, featuring crispy beer-battered sweet Spanish onions. 

Featured French Onion Items: 

• French Onion Soup Burger   
• French Onion ‘Shroom Burger 
• French Onion Shack Stack 
• Parmesan Garlic Fries 
• Onion Rings