This caramelized onion and goat cheese tart is as beautiful as it is delicious. With under five ingredients and a little patience, you can serve a simple, elegant tart that pairs perfectly with a fresh green salad.
WHY YOU SHOULD MAKE THIS SIMPLE TART NOW!
If the words “tart” or “caramelized onions” make you think of complicated cooking, think again. This recipe is approachable — the only thing that really takes time is slowly caramelizing the onions to a deep, golden flavor. That patience is what makes the tart sing.
Think of this tart as a quiche-free version of a caramelized onion and goat cheese quiche: no custard, no fuss. The first time you make it you might suspect a missing step, but it really is that simple.
The sweetness of the onions is the star; the tangy goat cheese balances it perfectly. Finish with chopped fresh herbs or a light drizzle of balsamic for an extra flavor lift.
INGREDIENTS FOR THE Onion TART:
- Puff pastry: Store-bought puff pastry makes this recipe quick and reliable. Keep a box in the freezer so you can pull this together on short notice.
- Caramelized onions: When you learn to caramelize onions well, you’ll use them in everything — sandwiches, soups, salads and more.
- Goat cheese: The tang of goat cheese pairs wonderfully with sweet onions. If you prefer, substitute a cheese you enjoy.
- Time: Good caramelization requires low heat and patience. You can make the onions ahead of time and refrigerate them for easy assembly later.
HOW TO MAKE THE CARAMELIZED ONIONS
Start with 4–5 large yellow onions (about 3 pounds) for this tart. White or red onions will also work. Peel and slice the onions thinly into rounds.
Heat 2 tablespoons of olive oil in a large sauté pan over high heat. Add the sliced onions and a pinch of salt, stirring to coat. Cook for about five minutes on high just to begin softening, then reduce to medium-low.
Let the onions cook slowly, stirring every 8–10 minutes so they brown evenly. Depending on your pan and heat, this can take 30–45 minutes. Aim for a golden brown color with some deeply caramelized bits rather than a uniform dark brown. When done, remove from heat and set aside.
How to assemble the onion tart
Preheat the oven to 425°F (220°C). Let one sheet of puff pastry thaw on the counter until it’s still cold but pliable, about 30–45 minutes.
Roll the pastry slightly into a large square on a piece of parchment paper. Spread an even layer of the caramelized onions across the center of the pastry, leaving a 1–2 inch border.
Dollop or crumble the goat cheese evenly over the onions. Fold the pastry edges up and over the filling to create a rustic free‑form tart.
Bake on a parchment-lined baking sheet at 425°F until the pastry is puffed and golden, about 20–25 minutes. Remove from the oven and transfer to a serving dish. Garnish with fresh herbs such as rosemary or thyme, if desired. The tart can be served warm or at room temperature.
FAQ’s
This tart adapts well to many cheeses:
Parmesan: Sprinkle over the tart after baking for a savory crisp.
Feta: A salty substitute for goat cheese.
Gruyère: Add at the end to melt for a rich, onion-soup–like finish.
For a creamier filling, stir about 1/4 cup crème fraîche or mascarpone into the onions before spreading them on the pastry.
Yes. Caramelized onions keep well in the refrigerator for up to a week and can be frozen. Make a big batch and use them for this tart, on burgers, in soups, mixed into mashed potatoes, or on roasted vegetables.
Yes. Many store-bought puff pastry brands are dairy-free; check the package. Cook the onions in olive oil or a plant-based butter. Omit the goat cheese or substitute a dairy-free soft cheese to keep a similar tangy profile.
Puff Pastry vs. Homemade Pastry Dough vs. Pie Dough
This recipe uses a freeform puff pastry crust for flaky, reliable results. If you prefer not to use puff pastry, you have options:
- Homemade pastry dough: Blind bake the crust for 15–20 minutes before adding the filling so the bottom stays crisp.
- Pie dough: Use a premade rolled pie crust or homemade dough. Blind bake as needed and then assemble and bake following the same steps.
What to serve with the Caramelized Onion Tart
This tart is perfect for brunch or a light dinner. It looks great warm or at room temperature. Complement it with:
- A big green salad for a fresh contrast
- Soup or a bread like coconut bread for a cozy spread
- Brunch items such as fruit, yogurt parfaits, or simple egg dishes
- Light wine—a crisp white pairs nicely for an easy weeknight meal
ONE MORE SIMPLE TIP
If you prefer a neater presentation, use a tart pan with a removable bottom to bake a round tart, or make individual tartlets by cutting puff pastry into circles. A tart pan gives a more refined shape; freeform baking yields a rustic look.
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📖 Recipe
Caramelized Onion and Goat Cheese Tart
Marni Katz
10 mins
1 hr 15 mins
1 hr 25 mins
Lunch
French
6
304 kcal
Ingredients
- 4-5 large onions about 3 lbs
- 4 oz goat cheese small log
- 1 sheet puff pastry
Instructions
Caramelized Onions
- Peel the onions and slice into very thin rounds.
- Heat 2 tablespoons olive oil in a sauté pan over high heat. Add onions and a heavy pinch of salt; cook about 5 minutes, stirring once.
- Reduce heat to medium-low and cook until brown and caramelized, stirring every 8–10 minutes. This may take up to 45 minutes. Remove and set aside.
Assemble and Bake Tart
- Let puff pastry thaw until cold but pliable, about 30–45 minutes. Preheat oven to 425°F.
- Roll the pastry slightly and place it on parchment on a baking sheet. Spread caramelized onions over the center, leaving a border. Sprinkle goat cheese over the onions.
- Fold the edges of the pastry over the filling to form a rustic tart. Bake until golden and puffed, about 20–25 minutes. Cool slightly before serving.
Notes
Keep an eye on the onions as they brown so they don’t burn; adjust the heat as needed.
Nutrition
Carbohydrates: 25 g
Protein: 7 g
Fat: 20 g
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