3-Ingredient French Onion Burgers
Recipe: https://recipestripper.com/recipes/2f93672f-b47f-4dda-b45f-4e716a662120
Original source: https://playswellwithbutter.com/french-onion-burger-recipe/
Recipe image: https://playswellwithbutter.com/wp-content/uploads/2026/05/French-Onion-Burger-12-225x225.jpg

Nothing is better than a good grilled French onion burger!
This easy recipe has been in my family since I was a kid - a simple homemade ground beef burger made with dry onion soup mix seasoning and Worcestershire sauce for a flavorful, juicy and satisfying grilled burger every time!
Made in less than 25 minutes. Serve 'em up plain and simple, or dress 'em up with crispy bacon, caramelized onions and a light and fluffy brioche bun.
Perfect for weeknight cooking or backyard BBQs!
Yield: 4
Prep time: PT10M
Cook time: PT6M
Total time: PT25M

Ingredients
- 1 ⅓ pounds 85% lean ground beef
- 1 1-ounce envelope onion soup seasoning mix
- 1 tablespoon Worcestershire sauce
- ½ teaspoon Morton coarse kosher salt
- for serving: toasted brioche burger buns, white cheddar or cheese of choice, crispy bacon, caramelized onions (below), lettuce, tomato, mustard, ketchup, Dijonnaise (below), etc.
- 2 large sweet onions, thinly sliced
- 1 tablespoon olive oil
- 1 tablespoon unsalted butter
- ½ teaspoon Morton coarse kosher salt
- 1 teaspoon balsamic vinegar
- ⅓ cup high-quality mayonnaise
- 2 tablespoons Dijon mustard
- 1 clove garlic, finely chopped or grated
- Morton coarse kosher salt and ground black pepper, to taste

Instructions
1. Prepare the grill for medium-high direct grilling, 450-500 degrees F. Prep any toppings and condiments as desired (see below).
2. Add the ground beef, onion soup seasoning mix, Worcestershire sauce and kosher salt to a large mixing bowl. Using your hands, mix just until well combined. Be careful not to overmix as it yields a dryer, tougher burger. Divide the mixture into 4 equal portions. Press each portion into a 1-inch thick burger patty. Use your thumb to press a slight indent in the center of each burger patty.
3. Place the burger patties on the grill grates, directly over the flame. Grill 3 minutes per side for medium doneness. If you prefer a less/more done burger, grill for 1 minute less/more. If making a cheeseburger, add the cheese to the burger patties in their last minute of grilling. Toast the St Pierre Brioche Burger Buns while you’re at it – see below!
4. Build your burgers as desired. At our house, the toasted St Pierre brioche buns get a quick schmear of Dijonnaise, topped with leafy lettuce, a French onion burger, crispy bacon, and caramelized onions. Serve immediately. Enjoy!
5. [Toppings and Condiments:] Lightly spritz the buns with nonstick cooking spray. In the final minute or so of grilling the burgers, place the buns on the grill grates over direct heat. Cook for 1 minute or so, until as toasty and crisp as desired. Remove from the grill and serve immediately.
6. [Toppings and Condiments:] Add all listed ingredients to a small bowl, whisking to combine. Feel free to add a hint of honey for some honey-mustard vibes, or a dash of your favorite spice blend. Set aside, or store in an airtight container in the refrigerator for up to 5 days.
7. [Toppings and Condiments:] Preheat the oven to 375 degrees F. Line a large baking sheet with aluminum foil for easy clean-up. Place the bacon on the prepared baking sheet. Bake for 10-12 minutes, until the rendered and crisp as desired. Remove from the oven and transfer the bacon to a paper towel-lined plate. Serve immediately or store in an airtight container in the refrigerator for up to 5 days.
8. [Toppings and Condiments:] Place the olive oil and butter in a large pan over medium-high heat. Once the butter is melted, add in the onions. Season with kosher salt and toss to coat in the oil. Reduce the heat to low. Cook for 45-60 minutes, stirring occasionally, until the onions are deeply brown and caramelly. In the last 5-10 minutes of caramelizing, deglaze the pan with the balsamic vinegar. Remove from the heat and serve immediately or store in an airtight container in the refrigerator for up to 5 days.