A French Onion Soup Grilled Cheese Sandwich is essentially French onion soup in grilled cheese form. Slices of sourdough is topped with gruyere cheese and wine, garlic and thyme infused caramelized onions and griddled to golden perfection.
Friday was the kind of day that calls for a cozy fire in the fireplace, a hot bowl of soup, grilled cheese sandwiches.
French Onion Soup Grilled Cheese Sandwich to be exact.
I’m pretty sure after the first bite we collectively died and got a sneak peak at what heaven is like. And since that first glorious bite I’ve now decided that in my heaven, grilled cheese is served all the time. Like we’re talking breakfast, lunch and dinner here. With salt and vinegar chips. And pickles. And cake.
Onions are caramelized in butter with garlic, fresh thyme and combined with white wine before topping sourdough bread, gruyere cheese and griddled to golden perfection.
To Make This French Onion Soup Grilled Cheese Sandwich You Will Need:
- unsalted butter
- yellow onions
- freshly ground black pepper
- white wine
- sourdough bread
- gruyere cheese
- salted butter
First things first, caramelize the onions.
Melt 4 tablespoons of unsalted butter in a large pan over medium-high heat. Meanwhile, slice the top and the bottoms off of your yellow onions and slice them 1/4 of an inch thick. Keeping the onions uniformed in thickness will help them cook evenly.
When the butter has melted, add in the onions, 2 cloves minced garlic, 1 teaspoon thyme leaves, 3/4 teaspoon kosher salt and 1/2 teaspoon freshly ground black pepper. Toss well to combine and so the onions are coated in butter. Cover and cook undisturbed for 5 minutes.
After the 5 minutes, remove the lid and reduce the heat to medium-low. Cook for 40 minutes, stirring every 5 minutes until the onions are soft and a deep golden in color. Reduce the heat if you notice the onions are browning too soon.
For a more thorough how-to click here for step-by-step instructions.
Once the onions are soft and reach a deep golden color pour in 3 tablespoons of dry white wine. I use Sauvignon Blanc, however beer or beef broth can be substituted.
After adding the wine, immediately scrape up any bits that are stuck to the bottom of the pan.
The onions will be all jammy like so just pull the pan off of the burner so they don’t burn.
Lay your slices of sourdough down and top with some of the grated gruyere. How much is up to you and the size of your slice of sourdough.
Top with a little of the caramelized onions.
Again, the amount is up to you. These slices are pretty large, however typically, this recipe should yield 4 maybe even 6 sandwiches.
Top the onions with a little more of the smoked Gruyere.
Preheat your griddle to 250° melt 1 tablespoon of butter per sandwich, spreading it around in pools roughly the size of your sandwiches.
Place the sandwiches down and increase the temperature of your griddle to 300°.
Gently pressing the sandwich into the butter.
Griddle the sandwiches until the underside is crisp and a deep golden brown.
Before flipping, use a spatula to lift the sandwich, melt another tablespoon of butter the same way you did before, and carefully flip the sandiwch on the second side. Gently pressing the sandwich into the butter.
Continue to cook until the second side deeply golden and crispy.
Cut your French Onion Soup Grilled Cheese Sandwich in half and serve immediately.
This is a pretty decadent grilled cheese. So fancy. And cheesy. It is exactly what I pictured the ultimate French onion soup grilled cheese to be.
Enjoy! And if you give this French Onion Soup Grilled Cheese Sandwich recipe a try, let me know! Snap a photo and tag me on twitter or instagram!
French Onion Soup Grilled Cheese Sandwiches
- 4 tablespoons unsalted butter
- 2 large yellow onions, sliced 1/4-inch thick
- 2 cloves garlic, finely minced
- 1 teaspoon fresh thyme leaves
- 3/4 teaspoon kosher salt
- 1/2 teaspoon black pepper
- 3 tablespoon dry white wine, beef stock or beer can be substituted
- 8 slices sourdough bread
- 8 ounces gruyere cheese, or regular gruyere will do
- 4 tablespoons salted butter
- Melt 4 tablespoons of butter in a large pan over medium-high heat.
- Meanwhile, cut the top and the bottoms off of your yellow onions and slice 1/4 of an inch thick. Keeping the onions uniformed in thickness will help them cook evenly.
- When the butter has melted, add in the onions, garlic, thyme, kosher salt and pepper. Toss until coated in the butter. Cover and cook undisturbed for 5 minutes.
- After the 5 minutes, uncover and cook on medium-low heat for 40 minutes, stirring every 5 minutes until the onions are soft and a deep golden in color.
- Pour in the wine and scrape any bits that accumulate on the bottom of the pot and then remove the pot off of the heat.
- Build your sandwiches by topping the sourdough slices with grated gruyere, caramelizd onions and more gruyere. Lastly, place the second slice of bread on top.
- Preheat your griddle to 250° melt 1 tablespoon of butter per sandwich, spreading it around in pools roughly the size of your sandwiches.
- Place the sandwiches down and increase the temperature of your griddle to 300°. Gently pressing the sandwich into the butter.
- Griddle the sandwiches until the underside is crisp and a deep golden brown.
- Before flipping, use a spatula to lift the sandwich, melt another tablespoon of butter on the griddle (as you did before) and carefully flip the sandiwch on the second side. Gently pressing the sandwich into the butter.
- Once the cheese is melted and the second side is crisp and golden, transfer to a cutting board and slice the sandwiches in half and serve.
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All the goodness of French onion soup in a sandwich. Lovely!! I’d like two, please. 🙂
So brilliant! I’ve been wanting to make french onion soup for the past couple weeks but haven’t had the time to make a gf baguette for topping the soup. This sounds like the perfect solution 🙂
Your caramelized onions are 100% perfect! LOVE the look of this sandwich!
OH man—-this looks sooooo amazing!!!
um…I think you’re right about the beer rule. we have that rule in our house, anyway!
I love you and Joy! Seriously I can’t stand how good this looks!
If I could form a coherent thought, I would, but……..yeah, I just want one of these NOW.
Please, oh my Lord, please, give this to me.
Laurie I’m crying over this. This is one of those that makes me think why didn’t I think of this. This is going to push my to tight pants over the edge and make them officially to small.
I NEED this right now! Holy yum!!
I LOVE french onion soup and I LOVE gruyere cheese. Going to Nordstroms today for the soup. MMMM Good pick…
There’s an awesome stall in the market near my office that does a similar sandwich and it’s pretty much the best thing ever so I can appreciate just how mind-blowingly awesome this version must be! Can’t wait to try this myself.
Laurie. Can I please come over and eat a huge cheesey french onion-y heaven sandwich with you? I’ll bring the cookies for dessert! and the beer – mandatory. It sounds like my friday night with Kevin – beer + cheese + rainy weather. But I had my cheese on top of a boring salad. a cheesy sandwich just sounds so much better right now.
I am so so very in love with this recipe – more cheese & bread please!
OHMYGOSH these sound TO DIE FOR. You are completely right, if I had this grilled cheese there would be no point in living any further. Holy moley. I need to make these very soon!
GET IN MY FACE!! I want to eat about 5 right now. Overkill? Nah.
Oh my word!
This grilled cheese looks perfect for the rainy monday I am having. Melty cheese and caramelized onions is a match made in food heaven!
YUM!! These just made me hungry. Too bad my husband isn’t a fan of french onion soup…I guess that means I would have to eat both. OH WELL
I just can’t even begin to explain how much I want one of these, or two, for dinner. Amazing!
You’re killing me with this sandwich….whaaaat? This looks insanely good. Seriously. 🙂
Mde tonight for dinner, along with some Potato Leek soup. Perfect Monday dinner on a cold, rainy day. Loved it – so did the wife and kids !
omg that block of gruyere cheese looks amazing. just shred it in my mouth! haha that sounds bad. anyway – i seriously want these in my life!
Oh wow Laurie! These look fantastic! You changed the way I made grilled cheese when you mixed mozzarella with pesta, and now you have done it again! Must try 🙂
Ugh. I meant “pesto” not pesta. I was so excited about this grilled cheese, my fingers started typing fast!
OMG….this looks like the DEFINITIVE grilled cheese gone francophone….I bookedmarked this entry so quickly I with such gusto that I almost broke my precious little laptop…and we certainly cannot have that happening just before the holidays with all of your SCRUMPTIOUS offerings carefully organized within its confines….
I am so going out NOW to procure the best smoked gruyère I can find ..Luckily…Switzerland is just a fifteen minute drive!..Also…Reader John is correct…a wonderful potato leek soup..or celeriac root/leek (a bit lighter/lower g.i. riff) would be PERFECTION with this….Not to say that we are, seriously, caring MUCH about the carb load here obviously…simply to JUUSTIFY devouring this in cozy, fireside fashion. You have really created the quintessential, ultimate grilled cheese here…My french/american family will freak…..Un grand MERCI BIEN…..
Ok…I don’t even really like onions, but am DROOOOLING over this sandwich! You definitely have a way! 🙂
This is what I want for dinner!!
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This is AH-Mazing!! Hubby would DIE for these!
Brilliant – combining the soup with the sandwich and extracting the best flavors from each. This is going on the must try list. Thanks for sharing.
Oh my goodness – I could just take a bath in that pile of caramelized onions! Not sure how that would work but you get my drift 🙂
oh wow! this is brilliant. French Onion soup is my favorite. I’ll take it in grilled cheese form any day!
This grilled cheese looks so delicious. Have you entered it in the Grilled Cheese Academy’s recipe showdown? If not, you should! Here’s the website: http://grilledcheeseacademy.com
This is THE BEST sandwich I think I have ever made! Totally recommend this!