Caramelized Onion & Goat Cheese Puff Pastry Bites
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At home, these caramelized onion puff pastry bites never last long. They’re just crisp puff pastry filled with deeply caramelized onions, a little goat cheese, and melty Gruyère cheese on top.
You might have spotted them on Instagram as “French Onion Soup Bites,” and honestly, the name fits. I make them all year round—for summer gatherings and holiday parties alike—and every single time, the plate empties faster than I can refill it. Best of all, you can assemble them ahead and bake them off at the last minute.
Recipe Card
Caramelized Onion Puff Pastry Bites
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Equipment
- 1 mini muffin pan
Ingredients
- 1 sheet puff pastry about 16 x 9½ in / 40 x 24 cm, thawed
- 4 yellow onions about 2 lb / 800 g, thinly sliced
- 2 tbsp olive oil
- 1 tbsp butter
- ½ tsp salt
- ⅔ cup fresh goat cheese or feta, cut into cubes
- 1 cup grated cheese Swiss cheese like Emmental or Gruyère
- 6 sprigs fresh thyme
Instructions
- Heat the olive oil in a large skillet over medium-low heat . Add the onions and salt.
- Let it cook gently for 30 to 40 minutes, stirring only occasionally until the onions are nicely caramelized. If they start to stick or brown too quickly, lower the heat and add a tablespoon of water every so often to loosen the browned bits.
- Preheat the oven to 200 °C/ 400° F . Butter the cups of a mini-muffin or mini-quiche pan.
- Roll out the puff pastry and cut it into 24 rectangles (or circles). Place them in the molds and press them down to form small baskets.
- In each mold, add a little goat cheese, a spoonful of caramelized onions, a few thyme leaves, and top with grated Gruyère.
- Bake for 12 to 15 minutes at 200 °C/ 400° F, until the dough is golden brown and the Gruyère is melted and bubbly. Serve warm.
Nutrition
Ingredients for These Caramelized Onion Puff Pastry Bites
You’ll see, you don’t need much, and besides, it’s pretty inexpensive:
- Puff pastry: Use store-bought to save time, and make sure to choose the all-butter kind—it’ll have much more flavor. If you have time, try my homemade puff pastry.
- Onions: I like to use large yellow onions because they are quicker to chop. I like to make sure that I have rather a generous amount, since they shrink significantly when cooked.
- Fresh goat cheese: The only ingredient which is not in a Classic French Onion Soup but here it adds a creamy texture and a hint of tang. You can substitute feta, Brie, or blue cheese if you prefer those.
- Grated cheese: Choose a Swiss cheese such as Gruyère or Emmental.
- Fresh thyme: A few leaves add a little flavor. Personally, I love the combination of thyme and onion.
How to Caramelize the Onions (The Key Step)
It’s really the caramelized onions that make this recipe special and a little extra delicious. And that’s where you’ll need a little time, because real caramelized onions don’t happen in 10 minutes—it takes 35 to 45 minutes. They need to be sautéed over low heat with a little oil and salt. The onions’ natural sugar does the rest—no need to add any extra. If you want the technique in detail, check out my article on how to make caramelized onions.
And if you don’t have time on the big day, don’t worry: you can make them 1 to 2 days in advance, or even freeze them.
How to Assemble These Puff Pastry Bites
Once your onions are ready, the assembly goes very quickly:
- Roll out the dough: Cut out squares or circles of puff pastry and place them in a buttered mini-muffin pan.
- Toppings: a little goat cheese on the bottom, a spoonful of caramelized onions, and a few thyme leaves. Finish with the grated cheese.
- Bake for 12 to 15 minutes at 400 °F (200 °C), until golden brown and puffed up.
Note: Just before baking, you can brush the edges of your puff pastry with an egg yolk mixed with a few drops of cold water to give it a golden color, but this isn’t necessary.
What Should I Serve with These Appetizer Puff Pastries?
Personally, I serve them just as they are during cocktail hour, right out of the oven, when they’re still nice and crispy. And if you want to add a few appetizers to turn it into a full-fledged cocktail party, here are my ideas:
- My smoked salmon cream puffs
- The viral checkerboard appetizer with Comté cheese and blackberries
- My gingerbread canapés with figs and cheese
- Christmas trees with fresh goat cheese during the holiday season;
- or an olive fougasse, a French bread resembling focaccia for the summer.
And if you love caramelized onions as much as I do, check out my caramelized onion tarte tatin or my pissaladière, a thin tart with caramelized onions and anchovies from Provence.
Tips & Variations for These Caramelized Onions Puff Pastry Bites
And for a change of pace:
- A stronger cheese: Replace the goat cheese with a little Roquefort or another strong cheese that can stand up to the sweetness of the onions.
- A hearty version: Add some pan-fried bacon bits and chopped walnuts.
- A sweet-and-salty touch: drizzle a little honey over the onions and sprinkle some raisins on top just before baking. It goes great with a stronger cheese like Roquefort.
- If you don’t have a mini-muffin pan: simply arrange the puff pastry rectangles on a baking sheet and fill them while they’re still flat.
Can You Make These Appetizer Bites Ahead of Time?
Yes, and it’s really handy when you’re having guests over! You can fill your ramekins a few hours ahead of time and bake them at the very last minute. Alternatively, you can bake them ahead of time and reheat them for 5 minutes at 350 °F (180 °C) just before serving—they’ll be crispy again. The caramelized onions, on the other hand, will keep for 3 to 4 days in the fridge in a sealed jar.
FAQ About Puff Pastry Appetizers
Yes. Once they’re baked and cooled, freeze them in a freezer bag or airtight container, then bake them for 8 to 10 minutes at 180 °C to restore their crispiness. You don’t need to thaw them beforehand.
I recommend using a good pure-butter puff pastry. It rises better and has much more flavor than one made with palm oil. And if you want to get a head start, you can make it yourself and freeze it at home without any worries.
For a cocktail reception where you’re serving a variety of items, plan on 4 to 6 appetizers per person, including all types of dishes. I also always add a cheese platter and my famous homemade butter! If these puff pastries are the only savory item, plan on serving 6 to 8 per guest—they go fast!
Yes, and I actually recommend it: they’re even better the next day. Make them the night before, store them in a jar in the fridge, and on the day you want to serve them, all you’ll have to do is whip them up and pop them in the oven.
I made this appetizer recipe for a dinner party last weekend and it was absolutely delicious! Highly recommend. My guests really enjoyed it and so did I. I usually make a classic french onion tart but this will be my new ‘go to’ for onion tart. The flavours were amazing. I also used smoked guyere – so good!!
Thank you so much, Arlette! I’m really happy you liked these appetizers. I never saw smoked gruyere but if I find some, I will try it.
They look delicious! I will try this next time I invite friends over. Do you think Cheddar would work just as nicely? I know it’s a different taste to Gruyere so wondering if that’s ok.
Hi Tatiana, thank you! Yes, cheddar would work as well! The taste will be just a little different but still very nice with the caramelized onions.