Sweet caramelized onions have a way of sweet talking most people into falling in love with them. Add some warm, melt-y, gooey Swiss cheese and some golden toasty bread into the mix and it shall surely make you go weak in your knees! A deconstructed French onion soup, this French onion grilled cheese recipe is not something you want to miss.

French Onion Grilled cheese Sandwiches, When you can't decide for soup or sandwiches for lunch!

Some things have a way of etching themselves onto your grey matter, would you agree? Most of these are emotional experiences that mattered to you in some way and it is hardly ever Math, algebra or physics (Unless you are Sheldon from the big bang theory!). However, as with any rule of thumb, there are exceptions and your silly brain helps you retain something useful which you can use in your everyday life.

For me, this useful retention has been some concepts from my supply chain management training from college. One of them is FIFO which means “First in, First out”. The concept is pretty self explanatory, it means that managing inventory, you should always first utilize the stock that you brought in first.

Sesame coated French Bread stuffed with caramelized onions and warm, melt-y cheese

Now, the problem arises with the fact that this concept has etched itself so deep into my grey matter that it makes me borderline OCD when managing my kitchen. I open u a bag of lentils and transfer a portion into a container for day-to-day use. When it is time to refill the container, I empty out the small quantity remaining in it before I can add more from the same open bag.  From the same bag the first batch came from?!! I have been laughed at quite a few times but…..

French Onion Grilled cheese Sandwiches, When you can't decide for soup or sandwiches for lunch!

That leads us to how I came about making French onion grilled cheese sandwiches. My FIFO obsessed brain refuses to give me permission to go grocery shopping until I have used up all the produce and dairy lying in my pantry, fridge and anywhere in my kitchen. With nothing else but bread, cheese and onions in my kitchen, and me not being able to (really, it’s almost like a an ankle bracelet prohibiting me from stepping outside the house), French onion grilled cheese sandwiches were pretty much the only option I had left.

Recipe for French Onion Grilled Cheese, sweet, golden onions with gooey cheese and warm toast-y bread....

But, who’s complaining?! Look at those beauties! My heart squealed with joy every time I sunk my teeth into these warm, toasty, juicy, caramel-y, cheesy French onion grilled cheese sandwiches…… Here is the recipe for:

French Onion Grilled Cheese Sandwiches


Prep Time: 5 minutes

Cook Time: 25 minutes

Total Time: 30 minutes

Serves: 2-3



  • 3 cups of sliced yellow/white onions
  • 1 tsp sugar
  • Salt to season
  • 1tbsp oil
  • Thin slices/or shredded cheese (preferably Swiss cheese)
  • Butter to toast bread
  • Sliced French Bread


  1. In a large heavy bottom skillet, heat oil on medium heat.
  2. Add onion and sauté for 3 minutes, stirring to coat.
  3. Turn heat down to medium low. Stir occasionally and continue sautéing for about 15 minutes or until the onions caramelize into a golden brown.
  4. Halfway through the process, add the salt, sugar and mix well.
  5. If the onions are sticking to the pan too much, use a tbsp. of vegetable stock or water to loosen them out. Once the onions are caramelized, set them aisde.
  6. Spread outer surface of sliced bread with softened butter. On the inner side of one slice spread a generous amount of caramelized onions and cheese. “Close” the sandwiches with the other slice of bread, and gently press together
  7. Heat some butter in the same skillet over medium heat. Place sandwiches in the pan and toast, carefully flipping when golden brown and cheese begins to melt. Cut in half and enjoy.

My Take:

You can add some fresh thyme and cinnamon to the onions while sautéing them.

You can use Cheddar or Mozzarella too in place of the Swiss cheese.

Yummily Yours'



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  1. I sure wish I had a similar “ankle bracelet”. Sometimes I buy more produce when there is no more room in the fridge. Most recently I tried sauerkraut in a grilled cheese sandwich; this looks just as good. I might add a little Dijon mustard and call it breakfast.

    • Ha ha 😀 I like what you call it, Ankle bracelet 😛 Sauerkraut Grilled Cheese sounds awesome! Next on my list 🙂

  2. Wow, nice recipe – the melting cheese, it is mouth watering

  3. Your recipe was a winner! I used gruyere cheese and added 2 tablespoons of red wine. So good! Will be making this again and again!

  4. All I can say is yummm! Caramelized onions, melted cheese and perfectly toasted bread sounds like heaven on a plate. Such an interesting yet easy to follow recipe. I was even able to use my favourite Go cheese which melted into the perfect creamy stringy texture. Will definitely be sharing this recipe with my friends. Thank you once again!

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