Shake Shack, Shake Stack Burger: 9/10

• An American fast food chain burger experience with a touch of finesse.

• More polished than it's imported rival Five Guys, Shake Shack delivers a fun, slightly cutesy casual dining range with some innovative twists.

• An excellent invention, the 'Shroom Burger is a crisp-fried portobello mushroom filled with melted cheese, and is offered as an add-on to the house cheeseburger to create the best item on the menu, the Shake Stack Burger.

• Unimaginative fries however, crinkle cut with or without cheese.

• Novel range of custard-based drinks and deserts to complete your All-American meal.