Copycat Shake Shack 'Shroom Burger

"Vegetarians rejoice! Shake Shack has a cheese filled burger for you and it’s gooood! You have to taste it to believe it. The ShackSauce is not to be missed."
photo by EmKenBken photo by EmKenBken
photo by EmKenBken
photo by EmKenBken photo by EmKenBken
photo by EmKenBken photo by EmKenBken
Ready In:
1hr 10mins




  • Heat oven to 375 degrees F.
  • ShackSauce:

  • In a small bowl, stir together; mayonnaise, mustard, ketchup, pickle brine, and cayenne pepper. Refrigerate until ready to use.
  • Mushroom Stuffing:

  • Using 2 tablespoons of oil, lightly oil two rimmed baking sheets; place mushroom caps gill side down. Brush mushroom caps with 2 tablespoons oil, season with salt and pepper. Place in preheated oven. Cook until tender, 30 to 35 minutes. Set aside until completely cool. Using a sharp knife, slice mushrooms in half horizontally, making sure to cut two even slices, without holes.
  • Mushroom Filling:

  • Meanwhile, make the mushroom filling. In a medium bowl combine: the cheeses, onion powder, garlic powder, 1/2 teaspoon flour, the egg yolks, and the cayenne pepper. Shape the filling into 8 equal patties, 1/2 inch smaller in diameter than the mushroom caps. Place prepared cheese patties on the gill side of each sliced mushroom cap, making sure to leave a 1/2 inch border. Top each with other side of mushroom pressing firmly around edges to seal filling inside. If it is difficult to seal mushroom patties filling remove some cheese mixture.
  • Mushrooms Breading:

  • Place remaining flour in a wide dish. Place beaten eggs in another wide dish, place panko bread crumbs in a third wide dish, set aside.
  • Dredge the stuffed mushroom caps in the flour, dip in egg, coating them completely, then dredge in the panko. Repeat beading steps again with mushrooms. Refrigerate breaded mushrooms while heating oil.
  • Mushroom Frying:

  • In a medium sized heavy bottomed pot, fitted with a deep-frying thermometer, over medium-high, heat oil to 350 degrees F.
  • Line a baking sheet with paper towels. In batches, cook mushrooms, turning once, until deep golden brown on each side, about 2 to 3 minutes a side. Place mushrooms on prepared baking sheet to drain.
  • Dividing evenly, top bottom buns with fried ‘mushrooms, tomato, and lettuce. Spread tops of buns with ShackSauce. Close sandwiches. Serve Hot.

Questions & Replies

  1. Is the pickle juice sweet or dill?
  2. Is there an error in the ingredient amounts? 3 cups of flour for the mushroom filling seems like too much?
  3. Is the nutritional information correct? 2201.4 calories?! The nutrition chart as written states 2201.4 calories per serving. Each recipe serves 8. Perhaps the calorie count is per recipe?
  4. don't see egg yolks in filling


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