French Onion Soup Grilled Cheese Sandwich

A gourmet grilled cheese sandwich that captures the rich, savory flavors of French onion soup with caramelized onions, Gruyere cheese, and crusty bread.

Prep Time

15 minutes

Total Time

45 minutes

Calories

725 kcal

Difficulty

Medium

Equipment

5 items

Cost

£1.88/serving

Season:

☀️ Summer

Meal Type:

Lunch•Soup•Bread

Cuisine:

French

Cooking Style:

Grilling

Mood:

Comfort Food

Ingredients

Servings

3largeYellow Onions(Thinly sliced)

£1.20

2tablespoonsOlive Oil(Extra virgin)

£0.25

2tablespoonsButter(Unsalted)

£0.20

1teaspoonBrown Sugar(Packed)

£0.05

1teaspoonBalsamic Vinegar

£0.10

1teaspoonFresh Thyme Leaves(Chopped)

£0.30

8slicesCrusty Bread(Sourdough or baguette work well)

£1.50

8ouncesGruyere Cheese(Shredded or thinly sliced)

£3.50

4tablespoonsButter(For grilling the sandwiches)

£0.20

0.3cupBeef Broth(Optional, for deglazing pan and enhancing onion flavor)

£0.20

To tasteSalt

To tasteBlack Pepper

Total Cost

£7.50

£1.88 per serving

Instructions

1.
In a large skillet, heat olive oil and butter over medium heat. Add sliced onions and cook, stirring occasionally, until softened and translucent, about 10-15 minutes.
2.
Reduce heat to low and continue cooking, stirring frequently, until the onions are deeply caramelized and golden brown, about 15-20 minutes. Be patient, this step is key to flavor!
3.
If the pan gets too dry, deglaze it with the beef broth (optional). Add the brown sugar, balsamic vinegar, thyme, salt, and pepper. Stir well to combine and cook for another minute.
4.
Spread half of the bread slices with a generous layer of shredded Gruyere cheese. Top with a portion of the caramelized onions, then add another layer of Gruyere cheese. Finish by topping with the remaining bread slices.
5.
Melt butter in a griddle or large pan over medium-low heat. Place sandwiches in the pan and cook for 3-4 minutes per side, or until golden brown and the cheese is melted and gooey.
6.
Remove from the pan, slice in half (optional), and serve immediately.

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My Notes

Nutrition Information

Nutrition per serving (250g)

725 kcal / 3033 kJ

Carbs

49g

19% of RDA

Fat

45g

64% of RDA

Protein

32g

64% of RDA

Detailed Breakdown

Fibre

5 g

17% of RDA

Sugar

16 g

18% of RDA

Sodium

850 mg

37% of RDA

Saturated Fat

25 g

125% of RDA

Chef's Tips

For a richer flavor, use beef broth instead of water to deglaze the pan during caramelization.

If you like a tangier flavor, add a splash of dry sherry or white wine to the onions during the last few minutes of cooking.

To ensure the cheese melts evenly, use medium-low heat and cover the pan with a lid for a few minutes while grilling.

Serve with a side of tomato soup or a simple green salad for a complete meal.

Cooking Equipment

Large skillet

Cutting board

Knife

Spatula

Griddle or large pan

Wine Pairings

No wine pairing suggestions available for this recipe.

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Chef's Tips

For a richer flavor, use beef broth instead of water to deglaze the pan during caramelization.

If you like a tangier flavor, add a splash of dry sherry or white wine to the onions during the last few minutes of cooking.

To ensure the cheese melts evenly, use medium-low heat and cover the pan with a lid for a few minutes while grilling.

Serve with a side of tomato soup or a simple green salad for a complete meal.

French Onion Soup Grilled Cheese Sandwich

Ingredients

Instructions