Caramelized Onion Brie Toast on Sourdough

This Caramelized Onion Brie Toast on Sourdough is a simple yet elegant dish that I love to make when I want something comforting but a little fancy. The sweet caramelized onions pair perfectly with creamy, melted brie, while a drizzle of honey and fresh thyme add a beautiful balance of flavors. It’s the kind of toast that feels special enough for brunch, but I also enjoy it as a quick dinner or appetizer.

Why You’ll Love This Recipe

I like this recipe because it’s quick, indulgent, and incredibly flavorful with just a few ingredients. The combination of crispy sourdough, rich cheese, and sweet onions always feels like a treat. I also love how versatile it is—I can serve it as a light meal, share it as a party snack, or enjoy it alongside a salad or soup.

Ingredients

2 slices of sourdough bread
1 large onion thinly sliced
2 tbsp olive oil
1 tbsp butter
4 ounces brie cheese sliced
Fresh thyme leaves
Honey for drizzling
Salt and pepper to taste

(Note: All ingredient amounts are listed in the recipe card below.)

Directions

1. I start by heating olive oil and butter in a skillet over medium heat.
2. I add the sliced onion and cook slowly, stirring occasionally, until caramelized and golden brown, about 20–25 minutes. I season with salt and pepper.
3. While the onions cook, I lightly toast the sourdough slices until golden and crisp.
4. I place slices of brie cheese on the warm sourdough and let them soften slightly.
5. I spoon the caramelized onions over the brie.
6. I finish with a sprinkle of fresh thyme leaves and a drizzle of honey.
7. I serve the toasts warm, enjoying the mix of creamy, savory, and sweet flavors.

Servings and Timing

This recipe makes 2 servings. It usually takes me about 5 minutes to prepare and 25 minutes to cook, so the total time is around 30 minutes.

Variations

Sometimes I add a handful of arugula on top for a peppery bite. I also like swapping brie for camembert or goat cheese when I want a different flavor. For an extra indulgent version, I spread a thin layer of fig jam or balsamic glaze before layering on the brie and onions.

Storage/Reheating

I store any leftover caramelized onions in an airtight container in the fridge for up to 4 days. To reheat the toast, I place it in a 350°F oven for 5–7 minutes until warm and melty again. I avoid microwaving because the bread gets soggy.

FAQs

Can I make the caramelized onions ahead of time?

Yes, I often prepare them in advance and store them in the fridge to save time.

Do I need to peel the brie?

No, I usually leave the rind on since it’s edible and adds flavor, but I sometimes trim it off if I want a milder taste.

Can I use another type of bread?

Yes, I like using baguette slices, ciabatta, or even rustic whole grain bread.

Can I make this toast without honey?

Yes, I skip it or substitute with balsamic glaze for a different sweetness.

How do I get onions perfectly caramelized?

I cook them low and slow, stirring occasionally, and avoid rushing the process.

What can I serve with this toast?

I like pairing it with a fresh green salad or a bowl of soup.

Can I use red onions instead of yellow?

Yes, red onions caramelize well and add a slightly sweeter flavor.

Can I bake the toast instead of pan-toasting?

Yes, I assemble the toast and bake it in the oven at 375°F for about 8 minutes.

Is this good as an appetizer for guests?

Definitely, I cut the toast into smaller pieces and serve it as a crowd-pleasing starter.

Conclusion

This Caramelized Onion Brie Toast on Sourdough is one of my favorite ways to enjoy a mix of sweet, savory, and creamy flavors. I love how easy it is to put together, yet it feels elegant enough for entertaining or treating myself. Every bite is warm, rich, and satisfying, making it a recipe I come back to again and again.

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