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French onion soup grilled cheese

Hand pulls melted cheese from a grilled sandwich with caramelized onions on a clear plate. Wooden table, casual setting.

By Tom · Updated

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  • Serves 2
  • About 1 hour
  • Takes a bit of care

I combined French onion soup & grilled cheese.

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The recipe

French onion soup grilled cheese

French onion soup grilled cheese. Ready in about 60 minutes, serves 2.

  • Serves 2
  • 15 min prep
  • 44 min cooking
  • Takes a bit of care

Times and difficulty are our estimates from the method, not stopwatch figures.

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2 servings
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Ingredients

French onion grilled cheese

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A dotted underline means the amount has been rounded to something you can measure.

Method

  1. Step 1

    In today's recipe, I fuse the deep, savoury richness of French onion soup with the ultimate comfort food: a perfectly golden, crispy grilled cheese (70 g) sandwich. We're talking caramelised onions (2 onions), layers of melty cheese, and buttery, toasted sourdough. I hope you enjoy it.

French onion grilled cheese

  1. Step 1: Caramelise onions

    Melt butter (30 g) in a pan over medium heat. Add onions (2 onions) and salt. Cook 30-40 min until deep golden brown. Add wine (60 ml) and thyme (1 tsp), cook until evaporated. Stir in beef broth (125 ml) and reduce until jammy. Set aside.

  2. Step 2: Assemble sandwich

    Butter (30 g) one side of each slice of bread (4 slices). On unbuttered side, layer Gruyère, caramelised onions (2 onions), and cheddar cheese (35 g). Top with second slice.

  3. Step 3: Grill

    Heat frying pan over medium-low. Cook sandwich until both sides are golden and cheese (70 g) is melted, about 3-4 min per side.

  4. Step 4: Serve

    Slice and enjoy. Optional: serve with small side of beef broth (125 ml) or French onion (2 onions) soup as dip.

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Questions people ask

How long does french onion soup grilled cheese take?

About 1 hour from start to finish, of which 15 min is prep and 44 min is cooking. That figure is worked out from the method rather than timed with a stopwatch, so give yourself a little more the first time.

How many does it serve, and can I change that?

As written it serves 2. Use the scale control on the recipe card to change it: every quantity in the ingredients and inside the method steps updates with it. Seasoning, and anything measured in pinches or splashes, is deliberately left alone.

Can I see the ingredients in ounces and pints?

Yes. The metric and imperial switch on the recipe card converts every quantity, rounded to amounts you can actually weigh or measure rather than to four decimal places. Your choice is remembered for every recipe on the site.