All of your favorite things about french onion soup, morphed into a grilled cheese sandwich!
I LOVE a good bowl of French onion soup. I think I got my love for it from my mama! Even when it’s 100′ outside, it seems like it’s always the first thing she looks for on the menu when we go out to eat
You can take your grilled cheese game to a whole new level with this French Onion Grilled Cheese Sandwich! Filled with the rich, savory goodness of caramelized onions, the creamy melt of gooey cheese, all sandwiched between buttery, crispy bread. It’s the ultimate comfort food mashup that’s also perfect for Lent! Trust me, your taste buds will thank you. If you’re loving this grilled cheese variation be sure to check out the Dill-ightful Grilled Cheese too!

Ingredients
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Instructions
- Peel and cut your onions in 1/2, then slice thinly. I used a mandolin to make quick work of this! This mandoline slicer is a FINGER SAVER and perfect for kids that want to help out in the kitchen.
- Get out your skillet, I love my cast iron. If you take care of cast iron it will last forever! I like my old skillets that belonged to my Grandma, but this set made by Utopia is also great! Cast iron is fairly cheap and is pretty hard to do any damage to that it won’t recover from. Over medium-high heat, melt 2 tablespoons of butter. Add the onions, then season with salt and pepper. Cook, stirring once or twice, until the onions soften, about 5 minutes. Reduce the heat to medium-low, and continue cooking, stirring occasionally, until the onions are a deep golden brown, around 20 minutes. If the onions start to dry out or risk burning, add a splash of water, a tablespoon at a time, and scrape up any browned bits from the bottom of the pan. When the onions are done, add the (optional) chopped dates at the very end just to heat them up. For extra flavor, you can deglaze the skillet with a bit of balsamic vinegar once the onions are done, cooking until the liquid evaporates, about 1 minute.
- Combine your shredded cheese with your onions.
- Spread a layer of the cheese/onion mixture on your bread.
- Cover both outer pieces of bread with a layer of butter and cook the sandwich in your skillet until both sides are browned to your liking. Then it’s time to DIG IN! Yum!
French Onion Grilled Cheese Sandwich

All your favorite things about french onion soup, morphed into a grilled cheese sandwich!
Take your grilled cheese game to a whole new level with this French Onion Grilled Cheese Sandwich! Imagine the rich, savory goodness of caramelized onions, the creamy melt of gooey cheese, all sandwiched between buttery, crispy bread. It's the ultimate comfort food mashup that’s perfect for lunch, dinner, or any time you're craving something extra delicious. Trust me, your taste buds will thank you.
Ingredients
- 4 slices of bread
- 5 oz Regular or Smoked Gruyere Cheese shredded (mozzarella would work here too!)
- 1 medium/large yellow or Vidalia Onion
- 4 tbsp butter
- salt and pepper to taste
- 1-2 tsp balsamic vinegar (optional)
- 4 dates chopped small (optional)
Instructions
- Peel and cut your onions in 1/2, then slice thinly. I used a mandolin to make quick work of this!
- In your skillet over medium-high heat, melt 2 tablespoons of butter. Add the onions, then season with salt and pepper. Cook, stirring once or twice, until the onions soften, about 5 minutes. Reduce the heat to medium-low, and continue cooking, stirring occasionally, until the onions are a deep golden brown, around 20 minutes. If the onions start to dry out or risk burning, add a splash of water, a tablespoon at a time, and scrape up any browned bits from the bottom of the pan.
- When the onions are done, add the (optional) chopped dates at the very end just to heat them up. For extra flavor, you can deglaze the skillet with a bit of balsamic vinegar once the onions are done, cooking until the liquid evaporates, about 1 minute.
- Combine your shredded cheese with your onions.
- Cover both outer pieces of bread with a layer of butter and cook the sandwich in your skillet until both sides are browned to your liking. Then it's time to DIG IN! Yum!