This bodacious burger is the definition of “umami.” It’s positively bursting with sumptuous, savory flavors sure to knock any burger aficionado’s socks off. All-beef patties are flecked with truffle zest, then seared to juicy perfection. On top, there’s a pile of buttery sautéed mushrooms, a shatteringly-crisp Parmesan frico, and luscious truffle cream. It’s all tucked into brioche buns and served with crispy potato wedges and a fresh green salad with pickled shallots on the side. Yeah, these are the type of burgers you may feel compelled to break out the fine china for.

• Wheat
• Milk
• Eggs 

Produced in a facility that processes milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soybean.


1 unit Shallot 
1 unit Lemon 
340g Yukon Gold Potatoes 
¼ cup Parmesan Cheese (ContainsMilk) 
115g Button Mushrooms 
1 unit Beef Stock Concentrate 
2 unit Brioche Buns (ContainsMilk, Wheat, Eggs) 
280g Ground Beef 
2 g Truffle Zest 
2 tablespoon Mayonnaise (ContainsEggs) 
4 tablespoon Sour Cream (ContainsMilk) 
55g Mixed Greens 
¼ teaspoon Sugar 
4 teaspoon Olive Oil 
2 teaspoon Vegetable Oil 

• Baking Sheet
• Small Bowl
• Zester
• Large Pan
• Medium Bowl


1 • Preheat oven to 230c. Wash and dry all produce. Peel and thinly slice shallot. Zest and quarter lemon. In a small bowl, combine half the shallot, juice from 2 lemon wedges, 2 TBSP hot water (¼ cup for 4 servings), and ¼ tsp sugar (½ tsp for 4); set aside. Cut potatoes into ½-inch-thick wedges; toss on a baking sheet with a large drizzle of olive oil, salt, and pepper. Roast on top rack for 15 minutes.

2 • Once potatoes have roasted 15 minutes, remove from oven and push to one side of the sheet. Mound Parmesan on the empty side in two even piles. (For 4 servings, leave potatoes roasting and add cheese to a second sheet; bake on middle rack.) Return to oven and bake until cheese is melted and crispy at edges and potatoes are tender, 5-7 minutes more. Let frico cool for 1 minute on the sheet, then transfer to a plate.

3 • Meanwhile, trim and thinly slice mushrooms. Heat a large drizzle of oil in a large, preferably nonstick, pan over medium-high heat. Add mushrooms; cook until golden brown, 3-4 minutes. Add remaining shallot; cook, stirring, until softened, 2-4 minutes. Stir in ¼ cup water (⅓ cup for 4 servings) and stock concentrate; cook until liquid has mostly evaporated, 1-2 minutes. Season with salt and pepper. Turn off heat; transfer to a plate. Wipeout pan.

4 • Meanwhile, halve buns. In a medium bowl, combine beef and ¼ tsp truffle zest (½ tsp for 4 servings; you’ll use more later). Season generously with salt and pepper. Form into two equal-sized patties (four patties for 4), each a bit wider than a burger bun.

5 • Heat a drizzle of olive oil in pan used to cook mushrooms over medium-high heat. Add patties and cook to desired doneness, 3-5 minutes per side. Meanwhile, in a second small bowl, combine mayonnaise, sour cream, ¼ tsp truffle zest (½ tsp for 4 servings), salt, and pepper. (Taste and add more truffle zest if desired.) Toast buns until golden. 

6 • Drain pickled shallot; toss in a second medium bowl with mixed greens, juice from remaining lemon, a drizzle of olive oil, salt, pepper, and lemon zest to taste. Spread cut sides of buns with a bit of truffle cream. Fill buns with patties, mushroom mixture, and frico. Serve with potato wedges, salad, and remaining truffle cream on the side.

Thanks to HelloFresh for this amazing recipe