This winter, Shake Shack is serving up next-level comfort with the arrival of its French Onion limited-time menu.

Inspired by the deep, savoury flavours of the classic soup, the menu layers caramelised onions, Emmental cheese, crispy shallots and roasted garlic mayo across signature Shack classics.

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Here’s what’s on the menu:

French Onion Burger (single or double)
Emmental cheeseburger topped with crispy shallots, caramelised onions and roasted garlic mayo

French Onion ’Shroom
Crisp fried portobello mushroom filled with a blend of melted cheeses, topped with caramelised onions and roasted garlic mayo

French Onion Shack Stack
Emmental cheeseburger topped with a ’Shroom Burger, caramelised onions and roasted garlic mayo

Roasted Garlic Mayo Fries
Crispy crinkle cut fries topped with roasted garlic mayo, parmesan and spring onions

Onion Rings
Crispy beer-battered onion rings made from sliced sweet Spanish onions, served with tangy sour cream & onion sauce or roasted garlic mayo.

Chocolate Churros Shake
Hand-spun cinnamon churro frozen custard topped with spiced dark chocolate sauce, whipped cream and chopped churros

Pineapple Mint Lemonade
Pineapple purée and mint mixed with our house-made lemonade

This menu is available for a limited time only—from 26 February to 20 May, exclusively at UK Shacks.

Layers on layers. 🧅🧀