Prep: 10 mins
Cook: 25 mins
Total: 35 mins
Servings: 4 servings
Yield: 4 burgers
Caramelized onions, mushrooms, and Swiss cheese smother this burger in a blanket of deliciousness. It’s easy to prepare, but it looks like it’s from a fancy steakhouse. We served it on a decadent brioche bun and topped it all with a homemade truffle aioli. If you can’t find truffle oil, the sauce is just as delicious without it. You can also make homemade buns if you like.
Serve these babies on a weeknight or for a fun dinner party. Some crispy fries on the side are a must.
Ingredients
For the Burgers:
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5 tablespoons butter, divided
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1 small onion, thinly sliced
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2 teaspoons salt, divided
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2 cups mushrooms, sliced
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1 teaspoon Worcestershire sauce
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1/2 teaspoon dried thyme
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4 brioche burger buns
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4 (3-ounce) ground beef burger patties
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1 teaspoon ground black pepper
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1 cup Swiss cheese, or Gruyère, shredded
For the Truffle Aioli:
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1/2 cup mayonnaise
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1 teaspoon salt
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1/2 teaspoon ground black pepper
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1 teaspoon lemon juice
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1/2 teaspoon truffle oil
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1 garlic clove
Steps to Make It
Make the Burgers
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Gather the ingredients.
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Start by preparing the mushroom and onions. Heat a sauté pan on medium-high heat. Add 3 tablespoons of the butter, sliced onion, and 1 teaspoon of the salt. Sauté for 5 minutes, stirring frequently, until the onion becomes softened and slightly browned.
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Push the onion to one side of the pan and add the mushrooms. Sauté until the mushrooms are browned and the onion is even softer, about 3 minutes.
Add the Worcestershire sauce and dried thyme and toss to combine. Cook for another minute and then remove from the heat and set aside.
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Heat a cast-iron pan on medium-high heat. Add the remaining 2 tablespoons of butter. Once melted, add the buns to the pan cut-side down and toast them until they are golden brown. You will probably have to toast them in 2 batches.
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Salt and pepper both sides of the burgers with the remaining 1 teaspoon salt and all of the pepper. Keeping the pan at medium-high, cook the burgers for about 5 minutes per side until browned on both sides for medium doneness.
Make the Truffle Aioli and Assemble the Burgers
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While the burgers are cooking, gather the ingredients for the truffle aioli.
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Whisk together the mayo, salt, pepper, lemon juice, and truffle oil. Grate the garlic into the mixture using a Microplane grater (or finely mince it) and whisk to combine.
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During the last minute or two of cooking, sprinkle the tops of the burgers with some of the shredded cheese. Then divide the mushroom mixture among the 4 burgers and then top with the remaining shredded cheese. Cover the pan with a lid and cook for the remaining 1 or 2 minutes to allow the cheese to melt.
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Slather the bun with the aioli.
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Top the bun with the mushroom and cheese-coated burger and dig in.
| Nutrition Facts | |
|---|---|
| Servings: 4 | |
| Amount per serving | |
| Calories | 848 |
| % Daily Value* | |
| Total Fat 61g | 78% |
| Saturated Fat 24g | 121% |
| Cholesterol 173mg | 58% |
| Sodium 2277mg | 99% |
| Total Carbohydrate 39g | 14% |
| Dietary Fiber 3g | 12% |
| Total Sugars 8g | |
| Protein 37g | |
| Vitamin C 5mg | 26% |
| Calcium 339mg | 26% |
| Iron 6mg | 34% |
| Potassium 735mg | 16% |
| *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice. | |
