These cheese and onion toasties are filled with caramelized onions and gruyere cheese. They’re pan fried until golden on both sides with an unbelievable melty interior and have been named to be the ultimate comfort food! Think grilled cheese sandwich on steroids!
Why I love this onion sandwich recipe:
A grilled cheese and tomato soup combination is widely known as one of the most comforting meals out there. For me, a hot bowl of french onion soup comes in as a close second place. Lucky for us, these cheese and onion toasties are basically french onion soup in sandwich form! Not sure how it could get any more comforting!
Ingredients for my favorite cheese and onion toastie!
- Softened butter
- Sweet onions
- Dried thyme
- Gruyere cheese
- Brioche bread
My top tips for making a delicious toastie:
- Thinly slice the onions: Getting a thin slice on the onions not only helps them cook faster, they’re also easier to eat once they’re in the cheese toastie.
- You want to have a cheese that melts well: Gruyere is great for this and is what’s commonly used in french onion soup so it helps mirror the flavor in the sandwich!
- Use soft bread: I like brioche because it’s super soft and buttery. If you don’t want to use brioche, challah bread would be a nice soft option as well.
- Make sure to butter the exterior of bread: You only need to butter the side of the bread slices that will be making contact with your frying pan. Using softened butter is crucial for getting an even spread. This is what makes the sandwich so delicious and golden on the outside so don’t skip it!
- Cooking on low heat: You don’t want to rush this sandwich. It’s easy to cook on too high of heat and end up with a charred exterior and cold interior. Make sure to cook on low so that the cheese has time to melt while the outside is becoming golden.
How to make the best toastie recipe with cheese and onions:
- Sauté the onions: Don’t rush it, you their natural sweetness to come out as they soften.
- Butter your slices of bread and build the sandwiches.
- Cook until golden brown on both sides, flipping halfway through.
Sure! They are a little meatier and less tender than sweet yellow onions but will still work!
I know this is a big debate for many, but butter will always take the cake for me. I think it is more flavorful and just does a better job of browning the exterior of the bread.
Swiss cheese and gouda cheese would still be great backup options. They are both mild in flavor and melt well.
My favorite brioche will always be from Trader Joes. It’s soft, buttery, cut into thick slices and everything you can dream of!!!
Cheese And Onion Toastie
- 4 tbsp softened butter split in half
- 1 sweet yellow onion thinly sliced
- 1 tsp dried thyme
- 1/2 tsp salt
- 4 oz gruyere cheese
- 4 slices brioche bread I love the one from Trader Joes
- Cut the onion in half, peel back its skin and start to make thin slices.
- In a large skillet, add 2 tbsp butter (save the rest for buttering the bread) and let that melt.
- Once melted, add in the garlic and sauté for one minute or until fragrant.
- Add the onion slices to the skillet with butter and garlic. Season with dried thyme and a little salt.
- Sauté on low heat, tossing occasionally until the onions are softened and golden in color (takes roughly ten minutes).
- When the onions are done cooking, set them aside and spread softened butter on one side of each piece of bread.
- Set the bread (butter side down) in a skillet on low heat. Layer on gruyere, then the onions and a little more cheese on top.
- Set the other bread slices on top (buttered side up).
- Let the toastie brown for 2-3 minutes on each side. When done, the cheese should be warm and melty all the way through and the bread should be golden brown.