Shake Shack’s ’Shroom Burger | Food52

Shake Shack's 'Shroom Burger forgoes the constraints of the patty form to present a mushroom in its most dignified state—breaded, fried, and full of cheese. GET THE RECIPE ►► https://f52.co/2KXpc9I

Makes: 4
Prep time: 30 min
Cook time: 1 hrs

Ingredients:

For the mushroom caps and filling:

4 4-inch portobello mushroom caps
1/4 cup canola oil, plus more for deep-frying
1/2 teaspoon kosher salt
1/8 teaspoon freshly ground black pepper
1 1/2 cups plus 1/4 teaspoon flour, divided
3 eggs plus 1 egg yolk, divided
2 cups panko breadcrumbs
1 1/2 cups grated Muenster
1/2 cup grated cheddar
1/2 teaspoon minced onion
1/8 teaspoon minced garlic
1 dash Kosher salt
4 tablespoons ShackSauce (below)
4 hamburger potato buns, toasted
4 pieces green leaf lettuce
8 1/4-inch slices ripe plum tomatoes

For the ShackSauce:

1/2 cup Hellman's mayonnaise
1 tablespoon Dijon mustard
3/4 teaspoon Heinz ketchup
1/4 teaspoon kosher dill pickling brine
1 pinch cayenne pepper

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