Caramelized Onion Cheese Tart
A delightful Caramelized Onion Cheese Tart combining the rich sweetness of slowly caramelized sweet onions with creamy, tangy cheese in a flaky, buttery tart crust. Perfect as an appetizer, brunch treat, or light dinner, this dish offers a perfect balance of savory and sweet flavors with elegant presentation and customizable ingredients.
- Prep Time: 15 minutes
- Cook Time: 30 minutes
- Total Time: 45 minutes
- Yield: 6-8 servings 1x
- Category: Appetizers
- Method: Baking
- Cuisine: French-inspired
- Diet: Gluten Free (if using gluten-free crust)
Ingredients
Scale
For the Filling
- 3–4 large sweet onions (such as Vidalia), thinly sliced
- 2 tablespoons unsalted butter
- Salt and freshly ground black pepper, to taste
- 1 teaspoon fresh thyme leaves (or other fresh herbs)
- 6 ounces Gruyère or goat cheese, cut into small pieces or crumbled
For the Crust
- 1 sheet puff pastry or tart crust (enough to line a 9-inch tart pan)
Instructions
- Prepare the Onions: Slice sweet onions thinly and cook them slowly in 2 tablespoons of butter over low heat, stirring frequently, until golden brown and caramelized, releasing their natural sugars. Season with salt and pepper.
- Roll Out the Pastry: On a lightly floured surface, gently roll out your puff pastry or tart dough to fit a 9-inch tart pan, ensuring the edges are slightly higher to hold the filling.
- Assemble the Tart: Spread the caramelized onions evenly over the pastry base, then sprinkle or dot the cheese on top along with fresh thyme leaves.
- Bake to Perfection: Place the tart in a preheated oven at 375°F (190°C) and bake for 25-30 minutes, or until the pastry is golden and the cheese is melted and slightly browned.
- Cool and Serve: Allow the tart to cool slightly before slicing; this helps the flavors meld and makes serving easier.
Notes
- Cook onions low and slow to develop maximum sweetness without burning.
- Keep pastry cold until just before baking to help it puff and crisp properly.
- Do not overload the tart with too much filling to avoid a soggy crust.
- Use quality cheese that melts well and complements the onions’ sweetness.
- Allow the tart to rest slightly before slicing to maintain its structure.
Nutrition
- Serving Size: 1 slice (1/8th of tart)
- Calories: 280 kcal
- Sugar: 7 g
- Sodium: 200 mg
- Fat: 18 g
- Saturated Fat: 10 g
- Unsaturated Fat: 6 g
- Trans Fat: 0 g
- Carbohydrates: 20 g
- Fiber: 2 g
- Protein: 7 g
- Cholesterol: 45 mg
Keywords: caramelized onion tart, cheese tart, savory tart, onion tart, appetizer, brunch, puff pastry tart
Find it online: https://lillysplate.com/caramelized-onion-cheese-tart/
