Recipe for a French onion sandwich. Not soup, sandwich.

Our good friend Dan linked to an absolutely amazing-sounding recipe for a grilled cheese sandwich. Not just any old grilled cheese sandwich — one that attempts to improve on, of all things, French onion soup by turning it into a sandwich that apparently tastes pretty much like every good thing about the original classic. Hope the author, Kerry Saretsky, won’t mind too terribly if I nick it from her post at HuffPo, so I have it someplace I can stand to be for any longer than five minutes. (No offense, Kerry, it’s just all the antivax and Deepak Chopra nonsense that get me riled up.)

French Onion Soup Grilled Cheese Sandwiches

Image also credit to Kerry Saretsky, who really knows how to photograph food.  This looks absolutely sinful.

serves 4


3 tablespoons unsalted room temperature butter, divided
1 vidalia onion, sliced 1/8″ thick on a mandoline
Sea salt
1 dried bay leaf
1 1/2 tablespoons cognac
1/4 cup beef stock
Freshly cracked black pepper
8 3/4-inch slices of sourdough bread, about 1 8″ round loaf (see Note #1)
8 ounces gruyère, coarsely grated
8 ounces Italian fontina, coarsely grated (see Note #2)


1. Melt one tablespoon of butter in an 8.5-inch sauté pan over medium heat.
2. Add the thinly sliced onions, salt, and bay leaf. Cook 8 minutes, stirring often with a wooden spoon, until the onions are soft and golden, but not charred. If the onions begin to brown too quickly, add 2 tablespoons of water, and continue cooking.
3. Add the cognac off the heat, and allow to reduce 2 minutes over low heat.
4. Add the beef stock and cook on low heat for 3 minutes, until the onions are soft and jammy, and the pan is dry. Remove the bay leaf and discard.
5. Meanwhile, lightly butter one side of each slice of bread with the 2 remaining tablespoons of butter. Divide the cheese between all the unbuttered sides of bread, and scatter the onion mixture evenly on half of those slices. Then top each piece of onion and cheese bread with a slice of just cheese bread, so the butter is on the outside of the sandwich, and the onions are sandwiched between two layers of cheese.
6. Place in an 8.5-inch sauté pan on medium-low heat, place one sandwich at a time on the hot pan. Toast 2 minutes on the first side, lower the heat to low, and toast 4 minutes on the second, or until the outside of the sandwich is golden and crisp, and the cheese is melted. Cut in half, and serve immediately, with Dijon mustard and a few cornichons on the side.


1. You could also use a rustic French farmhouse round loaf.
2. Feel free to use either a mix of gruyère and fontina, or just 16 ounces gruyère.

Fair cop: I haven’t made this meal yet, but I have every intention of doing so at the earliest possible juncture.

Recipe for a French onion sandwich. Not soup, sandwich.
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4 thoughts on “Recipe for a French onion sandwich. Not soup, sandwich.

  1. 1

    I will use shallots instead of a vidalia onion when I try this. It sounds great. Grilled cheese sandwiches, assuming they have more than processed Kraft singles between slices of (shudder) white bread, truly rock.

  2. 2

    Shallots would probably work too, though the sweetness of the vidalia onion (especially caramelized in cognac!) was what I was looking forward to most. Well, that, and the sourdough. Okay, and the gruyere. Gads. So I’m looking forward to the whole thing.

  3. 4

    It combines the the meaty taste of corn tortillas with the tender taste of chicken followed quickly by a sharp taste of aged cheese….

    They work great as a supper with a good old fashioned can of beer or ice tea….

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