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Caramelized French Onion Tart | The Recipe Critic

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This onion tart is a young and scrumptious puff pastry topped with caramelized onions makes the right appetizer or facet dish! It’s insanely scrumptious and value being served at any social gathering or get-together!

I completely love a great appetizer as a result of I like a great social gathering! And the meals is what makes it or breaks it! Check out this incredible 5 minute dip, these scrumptious egg rolls, or these hen wings!

The top view of a cooked onion tart sliced into squares.

What’s an Onion Tart?

An onion tart is a incredible finger meals appetizer that may be served for any event and any visitor! You begin out with a big puff pastry, and also you prime it with some onions which were cooked and caramelized in sugar. When you add the caramelized onion to the puff pastry, you add some cheese and thyme, and then you definately bake them collectively! Slice it up and serve it to your friends on a platter!

Describing this as an appetizer is nothing in comparison with consuming it! The puff pastry cooks to the right golden brown, which supplies a slight crunch whenever you chunk it. Once you mix that with the deliciously flavored and caramelized textured onions, nicely, it’s sport over. It melts in your mouth, and also you actually received’t be capable to cease your self from coming again for seconds! Don’t miss out! Prepare dinner this on your subsequent banquet, and your friends will go loopy over it!

What Elements are in an Onion Tart Recipe?

The components on this recipe are easy and straightforward! Actually, you might have already got most of them able to go in your kitchen! Seize something that you simply don’t have already got on the retailer and get cooking! Your tastebuds are ready! Take a look at the recipe ard on the backside of the put up for actual measurements.

  • Puff Pastry: Tkae the time to thaw your puff pastry within the fridge, in a single day.
  • Candy Yellow Onions: Slices these up into skinny , even items in order that that they cook dinner collectively on the similar time.
  • Olive Oil: I used common olive oil to cook dinner the onions in.
  • Brown Sugar: This isn’t solely scrumptious however essential to get that caramelized glaze on the onions.
  • Kosher Salt: It will improve all the flavors on this recipe.
  • Gruyere Cheese: Should you don’t have this cheese then you may strive gouda, feta or mozzarella as an alternative!
  • Contemporary Thyme: I like to make use of recent thyme as a result of it has a stronger and scrumptious style.
  • Heavy Cream: That is what you’ll use to get that golden brown edge on the puff pastry!

The right way to Make and Onion Tart

This scrumptious recipe takes lower than an hour from begin to end. And that features all the cooking time. Besides this tastes higher! It’s a fantastic go-to for any appetizer choices and feels fancy, like one thing that you’d order at a restaurant…

  1. Prepare dinner onions: Warmth oil in a big deep pan on medium-high warmth. Stir within the onions and cook dinner for about 10 minutes or till softened and wilted. 
  2. Caramelize: Add the salt and brown sugar and cook dinner uncovered for a further 20 minutes till the onions are caramelized. Put aside and permit to chill when you put together the tart. Make certain your caramelized onions are cooled sufficient earlier than you set them on the chilly tart.
  3. Preheat: Preheat the oven to 400° Fahrenheit.
  4. Prep pastry puff: Rigorously unroll every pastry tart. Place them barely overlapping on a baking sheet lined with parchment paper. Flippantly press the 2 tarts creating one giant rectangular-sized tart. Fold up the edges round the entire tart to create a fairly completed edge. Prick with a fork each inch or so to assist forestall effervescent whereas baking.
  5. Add cheese: Sprinkle the cheese evenly on the tart. 
  6. Add onion combination: Evenly lay the onions on prime of the pastry.
  7. Brush with cream: Utilizing a pastry brush, brush the folded edges of the pastry with heavy cream to create that golden brown crust. Sprinkle on the thyme leaves.
  8. Bake: Bake for 18-20 minutes or till cheese has melted and pastry is crisp. Cool for five minutes earlier than reducing the caramelized onion tart into squares or triangles. Garnish with extra thyme leaves if desired.
6 pictures showing how to cook caramelized onions, how to add them to a puff pastry and get it ready to go into the oven.

Useful Ideas

I discovered a variety of success utilizing the next ideas when making the onion tart. The recipe can appear intimidating, however if you happen to comply with the following pointers, you will see that success in making the tart!

  • Thaw: Don’t neglect to plan forward to thaw the puff pastry dough within the fridge the evening earlier than.
  • Hold it cool: Hold the puff pastry refrigerated till prepared to make use of. The chilled pastry creates a flakey consequence.
  • Prick it: Make certain to prick the pastry with a fork to stop the pastry from effervescent.
  • Cooking onions: Cooking the onions low and gradual is finest for bringing out the sweetness. Be affected person! Enable the onions to chill for about 10 minutes earlier than assembling. This fashion the pastry stays chilled sufficient earlier than baking.
  • Cheese choices: Gorgonzola, brie, blue, gouda, feta, mozzarella, swiss chees or actually any cheese you suppose would pair nicely with the flavors.
  • Use parchment paper: Parchment paper is your finest pal when working with puff pastry. It additionally makes cleanup simple!
  • Ideas for serving: The tart will be sliced into squares, strips, or triangles. It serves fantastically any method!
  • Garnish concepts: I like to garnish with recent herbs earlier than serving. A drizzle of balsamic glaze can be a crowd pleaser!

The top view of a fully cooked onion tart, just out of the oven.

The right way to Retailer and Reheat Leftovers

As soon as your onion tart has cooled, then you may place it in an hermetic container and put it in your fridge. It’ll final 4-5 days. I like to recommend reheating it within the oven at 375 levels Fahrenheit for about 15-20 minutes or till it’s heated by.

A slice of onion tart on a flate with a silver fork.


  • Warmth oil in a big deep pan on medium-high warmth. Add onions and cook dinner for about 10 minutes or till softened and wilted.

  • Add the salt and brown sugar and cook dinner uncovered for a further 20 minutes till the onions are caramelized. Put aside and permit to chill when you put together the tart. Make certain your onions are cooled sufficient earlier than you set them on the chilly tart.

  • Preheat the oven to 400° Fahrenheit.

  • Rigorously unroll every pastry tart. Place them barely overlapping on a baking sheet lined with parchment paper. Flippantly press the 2 tarts creating one giant rectangular-sized tart. Fold up the edges round the entire tart to create a fairly completed edge. Prick with a fork each inch or so to assist forestall effervescent whereas baking.

  • Sprinkle the cheese evenly on the tart.

  • Evenly lay the onions on prime of the pastry.

  • Utilizing a pastry brush, brush the folded edges of the pastry with heavy cream to create that golden brown edge. Sprinkle on the thyme leaves.

  • Bake for 18-20 minutes or till cheese has melted and pastry is crisp. Cool for five minutes earlier than reducing into squares or triangles. Garnish with extra thyme leaves if desired.



Serves: 6

Energy627kcal (31%)Carbohydrates48g (16%)Protein14g (28%)Fats42g (65%)Saturated Fats14g (70%)Polyunsaturated Fats5gMonounsaturated Fats22gLdl cholesterol30mg (10%)Sodium560mg (23%)Potassium234mg (7%)Fiber3g (12%)Sugar7g (8%)Vitamin A317IU (6%)Vitamin C9mg (11%)Calcium262mg (26%)Iron2mg (11%)

All dietary info is predicated on third social gathering calculations and is barely an estimate. Every recipe and dietary worth will range relying on the manufacturers you utilize, measuring strategies and portion sizes per family.

Course Appetizer

Delicacies French

Key phrase Caramelized Onions, French Onion Tart, Onion Tart



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