French Onion Soup Grilled Cheese Croutons

Elevate your French Onion Soup with crispy, cheesy, caramelized onion croutons made from grilled sourdough.

Prep Time

15 minutes

Total Time

45 minutes

Calories

750 kcal

Difficulty

Medium

Equipment

4 items

Cost

£1.32/serving

Season:

☀️ Summer

Meal Type:

Lunch•Snack•Soup•Bread

Cuisine:

French

Cooking Style:

Grilling

Ingredients

Servings

4slicesSourdough Bread(Thick-cut)

£1.50

4ozGruyere Cheese(Shredded or thinly sliced)

£2.50

2largeYellow Onions(Thinly sliced)

£0.70

2tablespoonsButter(Unsalted)

£0.25

1tablespoonOlive Oil

£0.15

1teaspoonBrown Sugar

£0.02

1teaspoonBalsamic Vinegar

£0.05

0.5teaspoonThyme(Fresh, chopped (or 1/4 teaspoon dried))

£0.10

to tasteSalt

to tasteBlack Pepper(Freshly ground)

4bowlsFrench Onion Soup(Prepared)

Total Cost

£5.27

£1.32 per serving

Instructions

1.
Caramelize the onions: Heat butter and olive oil in a large skillet over medium heat. Add sliced onions and thyme. Cook, stirring occasionally, for 20-25 minutes, or until the onions are deeply golden brown and caramelized. Stir in the brown sugar and balsamic vinegar during the last 5 minutes of cooking. Season with salt and pepper to taste.
2.
Assemble the grilled cheese: Spread a generous layer of caramelized onions on two slices of sourdough bread. Top with shredded Gruyere cheese. Place the remaining bread slices on top to form sandwiches.
3.
Grill the sandwiches: Heat a grill pan (or preheat an outdoor grill to medium heat). Grill the sandwiches for 3-4 minutes per side, or until the bread is golden brown and the cheese is melted and bubbly. Alternatively, cook in a skillet over medium heat, flipping occasionally, until golden brown and cheese is melted.
4.
Cut into croutons: Cut each grilled cheese sandwich into small cubes (croutons).
5.
Serve: Ladle hot French Onion Soup into bowls. Top with the grilled cheese croutons and serve immediately.

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My Notes

Nutrition Information

Nutrition per serving (250g)

750 kcal / 3138 kJ

Carbs

55g

21% of RDA

Fat

45g

64% of RDA

Protein

35g

70% of RDA

Detailed Breakdown

Fibre

5 g

17% of RDA

Sugar

15 g

17% of RDA

Sodium

1200 mg

52% of RDA

Saturated Fat

28 g

140% of RDA

Chef's Tips

For extra flavor, brush the outside of the bread with a little butter or olive oil before grilling.

If you don't have a grill pan, you can use a regular skillet to grill the sandwiches.

Adjust the amount of caramelized onions and cheese to your liking.

The caramelized onions can be made ahead of time and stored in the refrigerator for up to 3 days.

Cooking Equipment

Large Skillet

Grill Pan (or Outdoor Grill)

Cutting Board

Knife

Wine Pairings

No wine pairing suggestions available for this recipe.

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