Mushroom Swiss Burger with White Truffle Mayo is a gourmet burger recipe that is easy to make at home! Sautéed mushrooms and onion top a juicy cheeseburger with truffle aioli.
To make the truffle mayo: combine mayonnaise, truffle oil, and garlic in a bowl. Set aside.
Divide ground beef into four equal balls, flatten and form patties (about 1/2 inch thick and 4 inch diameter).
Over medium heat, allow skillet to get hot and melt 1 tablespoon of butter. Add beef patties and cook until there is little to no pink (about 4 minutes each side) remove from heat and place a slice of Swiss cheese on top of each patty and allow to melt. Set aside.
In a frying pan over medium heat, cook mushrooms alone to allow them to release water stirring occasionally (about 5 minutes). Add the remaining 2 tablespoons of butter, chopped onion, salt and pepper, and sauté until the onions have a slightly translucent appearance (about 5 minutes).
Spread truffle mayo on each bun, add a hamburger patty, and a scoop of mushrooms. Enjoy!