Caramelized Onion Grilled Cheese
Updated Jan 28, 2025, Published on Nov 07, 2022
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This Caramelized Onion Grilled Cheese pairs perfectly with the Easy Tomato Soup recipe I made as part of my Fall Soup Series! I highly suggest you try these two recipes together, although this grilled cheese is amazing on it’s own as well.
I spread a layer of Fig Butter from Trader Joe’s on one side of the bread. This is optional, but I really do recommend you try it if you are able to find fig butter. It adds a perfect amount of sweetness to cut through the butter and cheese. It also compliments the sweetness from the caramelized onions perfectly.
If you make this Caramelized Onion Grilled Cheese, feel free to rate and comment!
Caramelized Onion Grilled Cheese
Equipment
Ingredients
Caramelized Onions
- 2 tablespoon Butter
- 1 tablespoon Extra Virgin Olive Oil
- 2 large Yellow Onion, thinly sliced; use more if smaller
- 1/4 cup Sherry, can substitute with vinegar, wine, or beef broth
- Kosher Salt & Black Pepper
Grilled Cheese
- 8 slices Bread, I used the Trader Joe's Tuscan Pane Bread
- 1 cup White Cheddar Cheese, freshly grated; estimate – use more as needed
- 1 cup Gruyère Cheese, freshly grated; estimate – use more as needed
- 1/2 cup Parmesan Cheese, freshly grated; estimate – use more as needed
- 4 tablespoon Fig Butter, optional
- 2 tablespoon Butter, divided for each sandwich; more as needed
- Easy Tomato Soup, recommend to serve!
Instructions
Caramelized Onions
- In a Dutch Oven or large pot, melt the butter and olive oil over medium heat. Add the thinly sliced onions, stir to combine with the butter, and add a big pinch of salt. Cook for 5 minutes. Turn heat to medium low and cook for 30-60 minutes until onions are deeply caramelized. The timing will depend on your pan, heat level, and amount of onions. Stir occasionally so onions don't burn.
- Once onions are caramelized, pour in the sherry to deglaze the pan. Scrape the bottom of the pan with a wooden spoon to loosen any stuck bits. Season to taste with salt and pepper. Remove the caramelized onions to a bowl to use later for the grilled cheese.
Grilled Cheese
- Assemble your grilled cheese. Lay down two slices of bread per sandwich. Optionally, on one piece of bread, evenly spread the fig jam. Next, add a layer of the reserved caramelized onions. Next, sprinkle on equal parts grated white cheddar and gruyere cheese. Use enough to thoroughly cover the sandwich. Place the other piece of bread on top.
- In a nonstick pan, melt a pat of butter over medium low heat. Add the assembled sandwich and cook for 3-5 minutes. Flip, add a little more butter if needed, and cook another 3-5 minutes until the cheese is melty. Turn the heat to medium high, lift the sandwich with a spatula, and sprinkle some parmesan cheese into the pan. Place the sandwich back onto the parmesan for a minute so it coats the bread and forms a crust. Flip and do the same thing on the other side.
- Repeat the process for each sandwich.
- Slice the sandwich in half and serve.
Video
@carolbeecooks Dip some ooey gooey caramelized onion grilled cheese in tomato soup! Next fall soup series recipe dropping tomorrow 🥰 #souptok #tomatosoup #grilledcheese #caramelizedonions
♬ original sound – Carolyn | Easy Recipes
Notes
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
A soup’s best friend right here. I made a bunch of caramelized onions for another recipe of yours and used the leftovers to make this grilled cheese! Such a great idea!