Shake Shack is at its best when given creative freedom. The burger patty is excellently meaty, and the bun soft and doughy, but the hamburger falls a little flat without toppings.
Despite its low position, the Veggie Shack is worth knowing about. The patty is a blend of healthy ingredients, topped with fried onions, pickles, and Shack Sauce.
Unfortunately, the patty tastes like the ingredients that it's made from, leading to an earthy-tasting burger. At nearly $9, this burger might not be worth the splurge.
However, the burger and the portobello overpower each other, taking away from the other what makes them each great. It's also one of the most expensive items on the menu.
That makes this limited-time burger less overwhelming physically while maintaining its strong flavor. It's a heavy, salty, overly rich burger, but worth a try.