French Onion Soup Burgers with Gruyere and Balsamic Onions

Gourmet burgers featuring juicy patties topped with sweet caramelized onions, nutty Gruyere cheese, and tangy balsamic-glazed onions, all served on toasted brioche buns.

Prep Time

20 minutes

Total Time

50 minutes

Calories

785 kcal

Difficulty

Medium

Equipment

4 items

Cost

£3.20/serving

Season:

☀️ Summer

Meal Type:

Breakfast•Soup•Bread

Cuisine:

French•American

Ingredients

Servings

1.5lbsGround Beef(80/20 blend for juiciness)

£6.00

3largeYellow Onions(Thinly sliced)

£1.20

0.3cupBalsamic Vinegar(Good quality)

£0.30

1tbspBrown Sugar(Packed)

£0.05

3tbspOlive Oil(Divided)

£0.20

2tbspButter(Unsalted)

£0.25

1tbspWorcestershire Sauce

£0.10

0.5tspDried Thyme

£0.15

4slicesGruyere Cheese

£2.50

4Brioche Buns(Toasted)

£2.00

To tasteSalt

To tasteBlack Pepper(Freshly ground)

0.5tspGarlic Powder

£0.05

Total Cost

£12.80

£3.20 per serving

Instructions

1.
In a large skillet, heat 2 tablespoons of olive oil and 2 tablespoons of butter over medium-low heat. Add sliced yellow onions and cook, stirring occasionally, for 25-30 minutes, or until deeply caramelized and golden brown. Season with salt and pepper to taste.
2.
While the onions are caramelizing, in a small saucepan, combine the balsamic vinegar and brown sugar. Bring to a simmer over medium heat and cook for 5-7 minutes, or until slightly thickened. Remove from heat and set aside.
3.
In a bowl, gently mix ground beef with Worcestershire sauce, garlic powder, salt, and pepper. Form into 4 equal patties.
4.
Heat 1 tablespoon of olive oil in a grill pan or on a grill over medium-high heat. Grill burgers for 4-5 minutes per side for medium doneness, or until cooked to your liking. During the last minute of cooking, place a slice of Gruyere cheese on each burger to melt.
5.
While the burgers are grilling, toast the brioche buns.
6.
To assemble the burgers, spread a layer of caramelized onions on the bottom bun. Top with a cheesy burger, a generous spoonful of balsamic onions, and the top bun. Serve immediately.

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My Notes

Nutrition Information

Nutrition per serving (300g)

785 kcal / 3284 kJ

Carbs

42g

16% of RDA

Fat

48g

69% of RDA

Protein

47g

94% of RDA

Detailed Breakdown

Fibre

4 g

13% of RDA

Sugar

18 g

20% of RDA

Sodium

650 mg

28% of RDA

Saturated Fat

22 g

110% of RDA

Chef's Tips

Don't overcrowd the skillet when caramelizing the onions. Cook in batches if necessary.

For a richer flavor, add a splash of dry red wine to the caramelized onions during the last 5 minutes of cooking.

You can add a teaspoon of Dijon mustard to the burger mixture for extra flavor.

Cooking Equipment

Large skillet

Small saucepan

Grill or Grill Pan

Toaster or Oven

Wine Pairings

No wine pairing suggestions available for this recipe.

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French Onion Soup Burgers with Gruyere and Balsamic Onions

Ingredients

Instructions