Shake Stack : The Burger overall was better than London. The mushrooms was flavorful and beef not dry, though I begin to notice Shake Shack tend to use lean and thin patties which can be easily overcooked, still juicy. The brioche is soft and suspect it’s corn bun, but still the bun gets easily soaked with the juices very fast, which I don’t like. Felt the brioche should be soft but at the same time toasted to receive the juices and not make it messy during the last bites.