Quick Recipe Version (TL;DR)
Quick Ingredients
- Burgers: 1 1/2 pounds 80/20 ground beef, 1 tablespoon Worcestershire sauce, 1 teaspoon kosher salt, 1 teaspoon black pepper, 1/2 teaspoon garlic powder, 1 tablespoon neutral oil
- Caramelized onions: 2 large yellow onions, thinly sliced; 1 tablespoon unsalted butter; 1 tablespoon olive oil; 1/4 teaspoon kosher salt; 1 teaspoon brown sugar; 1 tablespoon water, as needed
- Dijon aioli: 1/2 cup mayonnaise, 2 tablespoons Dijon mustard, 1 teaspoon lemon juice, 1 small garlic clove finely grated, 1/8 teaspoon black pepper
- To assemble: 4 rustic burger buns, 6 ounces brie sliced, 2 cups baby arugula, 1 tablespoon unsalted butter for toasting buns
Do This
- 1. Cook sliced onions with butter, olive oil, salt, and brown sugar over medium-low heat for 25 to 30 minutes until deep golden.
- 2. Stir together mayonnaise, Dijon, lemon juice, garlic, and black pepper; chill until ready to use.
- 3. Gently mix beef with Worcestershire, salt, pepper, and garlic powder; form 4 patties about 3/4 inch thick.
- 4. Toast buttered rustic buns in a skillet for 1 to 2 minutes until lightly crisp.
- 5. Sear burgers in a hot skillet over medium-high heat for 4 to 5 minutes per side, until they reach 160°F internally.
- 6. Add brie during the final 1 to 2 minutes, cover briefly, and let it soften over the patties.
- 7. Build burgers with Dijon aioli, arugula, brie-topped patties, caramelized onions, and top buns; serve immediately.
Why You’ll Love This Recipe
- Elegant without being fussy: Brie, Dijon, arugula, and caramelized onions bring French bistro flavor using ingredients you can find at most grocery stores.
- Steakhouse-style flavor at home: A simple seasoning blend, Worcestershire sauce, and a hot skillet create a deeply savory burger with a beautiful crust.
- Balanced and satisfying: Creamy brie, peppery arugula, sweet onions, and tangy Dijon aioli keep every bite rich but not heavy.
- Perfect for entertaining: The onions and aioli can be made ahead, so the final cooking feels relaxed and manageable.
Grocery List
- Produce: 2 large yellow onions, 2 cups baby arugula, 1 lemon, 1 small garlic clove
- Dairy: 6 ounces brie cheese, 2 tablespoons unsalted butter
- Meat: 1 1/2 pounds 80/20 ground beef, preferably ground chuck or a chuck-sirloin blend
- Bakery: 4 rustic burger buns, brioche buns, or crusty bakery rolls
- Pantry: Mayonnaise, Dijon mustard, Worcestershire sauce, olive oil, neutral oil, brown sugar, kosher salt, black pepper, garlic powder
Full Ingredients
For the Caramelized Onions
- 2 large yellow onions, thinly sliced, about 4 cups sliced
- 1 tablespoon unsalted butter
- 1 tablespoon olive oil
- 1/4 teaspoon kosher salt
- 1 teaspoon light brown sugar
- 1 to 2 tablespoons water, only as needed to loosen browned bits from the pan
For the Dijon Aioli
- 1/2 cup mayonnaise
- 2 tablespoons Dijon mustard
- 1 teaspoon fresh lemon juice
- 1 small garlic clove, finely grated or minced into a paste
- 1/8 teaspoon freshly ground black pepper
- Pinch of kosher salt, optional, to taste
For the Steakhouse-Style Burger Patties
- 1 1/2 pounds 80/20 ground beef, preferably ground chuck or a chuck-sirloin blend
- 1 tablespoon Worcestershire sauce
- 1 teaspoon kosher salt
- 1 teaspoon freshly ground black pepper
- 1/2 teaspoon garlic powder
- 1 tablespoon neutral oil, such as avocado, canola, or vegetable oil, for the skillet
For Assembly
- 4 rustic burger buns, split
- 1 tablespoon unsalted butter, softened, for toasting the buns
- 6 ounces brie cheese, rind left on if desired, sliced into 1/4-inch-thick pieces
- 2 cups baby arugula, loosely packed
- Extra freshly ground black pepper, optional, for finishing
Step-by-Step Instructions
Step 1: Caramelize the onions
Place a large skillet over medium heat and add 1 tablespoon unsalted butter and 1 tablespoon olive oil. When the butter melts, add the thinly sliced onions, 1/4 teaspoon kosher salt, and 1 teaspoon light brown sugar. Stir well, then cook for 5 minutes, stirring occasionally, until the onions begin to soften.
Reduce the heat to medium-low and continue cooking for 20 to 25 minutes, stirring every few minutes. The onions should turn soft, jammy, and golden brown. If the pan looks dry or the browned bits on the bottom start to get too dark, add 1 tablespoon water and scrape the pan gently with a wooden spoon. When finished, transfer the onions to a small bowl and set aside.
Step 2: Make the Dijon aioli
In a small bowl, stir together 1/2 cup mayonnaise, 2 tablespoons Dijon mustard, 1 teaspoon fresh lemon juice, the finely grated garlic clove, and 1/8 teaspoon black pepper. Taste and add a small pinch of kosher salt if you would like it a little brighter. Cover and refrigerate while you prepare the burgers.
Step 3: Shape the steakhouse-style patties
Place the ground beef in a large bowl. Add 1 tablespoon Worcestershire sauce, 1 teaspoon kosher salt, 1 teaspoon black pepper, and 1/2 teaspoon garlic powder. Using your hands or a fork, mix gently just until the seasonings are distributed. Avoid overworking the meat, which can make the burgers dense.
Divide the mixture into 4 equal portions, about 6 ounces each. Shape each portion into a patty about 3/4 inch thick and slightly wider than the buns, since the patties will shrink as they cook. Press a shallow dimple into the center of each patty with your thumb; this helps the burgers cook evenly and stay flat.
Step 4: Toast the rustic buns
Spread the cut sides of the buns with 1 tablespoon softened butter total. Heat a large cast-iron skillet or heavy skillet over medium heat. Place the buns cut-side down in the skillet and toast for 1 to 2 minutes, until lightly golden and crisp at the edges. Transfer the buns to a plate or wooden board.
Step 5: Sear the burgers
Wipe out the skillet if needed, then place it over medium-high heat. Let it heat for 2 to 3 minutes, until very hot. Add 1 tablespoon neutral oil and swirl to coat the pan. Place the patties in the skillet, leaving a little space between them. Cook for 4 to 5 minutes on the first side without pressing down on the burgers.
Flip the patties and cook for another 3 minutes. For food safety, ground beef should reach an internal temperature of 160°F on an instant-read thermometer. Depending on the thickness of your patties and the heat of your pan, the total cooking time will usually be 8 to 10 minutes.
Step 6: Melt the brie
During the final 1 to 2 minutes of cooking, place the sliced brie over each patty. Cover the skillet with a lid or a sheet pan to trap heat and help the brie soften. Brie does not always melt like cheddar; it should become warm, creamy, and slightly slumped over the burger. Remove the patties from the skillet and let them rest for 3 minutes.
Step 7: Assemble the French bistro burgers
Spread a generous spoonful of Dijon aioli on the cut sides of each toasted bun. Place a small handful of baby arugula on each bottom bun, then add a brie-topped burger patty. Spoon the caramelized onions over the brie, letting a few strands fall naturally over the edges. Add a little extra black pepper if you like, then close with the top buns.
Step 8: Serve while warm
Serve the burgers immediately while the patties are juicy, the brie is soft, and the buns are still lightly crisp. These burgers are excellent with simple oven fries, a green salad, roasted potatoes, or cornichons on the side for a classic French bistro feel.
Pro Tips
- Choose the right beef: An 80/20 blend gives the best steakhouse-style balance of flavor, juiciness, and browning. A chuck-sirloin blend is especially good here.
- Do not rush the onions: True caramelized onions need medium-low heat and time. If the heat is too high, they will brown on the outside before becoming sweet and jammy.
- Keep the brie slices moderately thick: Slices about 1/4 inch thick soften nicely without disappearing completely into the burger.
- Toast the buns: A toasted bun adds texture and helps prevent the Dijon aioli and burger juices from soaking through too quickly.
- Rest the patties briefly: A 3-minute rest lets the juices settle so the first bite is juicy rather than messy in the wrong way.
Variations
- Mushroom bistro burger: Add 8 ounces sliced cremini mushrooms to the pan after caramelizing the onions. Cook with 1 teaspoon butter and a pinch of salt for 6 to 8 minutes, then pile them on with the onions.
- Peppercorn brie burger: Add 1/2 teaspoon cracked black pepper to the outside of each patty right before searing for a steak au poivre-inspired flavor.
- Turkey bistro burger: Use 1 1/2 pounds ground turkey, add 1 tablespoon olive oil to the meat mixture, and cook to an internal temperature of 165°F.
Storage & Make-Ahead
The Dijon aioli can be made up to 3 days ahead and stored in an airtight container in the refrigerator. The caramelized onions can be made up to 4 days ahead and refrigerated; rewarm them gently in a skillet over low heat or in the microwave in 20-second bursts. Uncooked patties can be shaped up to 24 hours ahead, covered, and refrigerated. For the best texture, cook the burgers just before serving. Leftover cooked patties can be refrigerated in an airtight container for up to 3 days and reheated in a covered skillet over medium-low heat until they reach 165°F. Store buns, arugula, aioli, onions, and patties separately so the burgers do not become soggy.
Nutrition (per serving)
Calories: 815 kcal | Carbs: 43g | Protein: 45g | Fat: 52g | Saturated Fat: 21g | Fiber: 3g | Sugar: 10g | Sodium: 1120mg | Cholesterol: 155mg
