5.0 from 9 votes
Caramelized Onion Tart
This tender and delicious puff pastry topped with caramelized onions makes the perfect appetizer or side dish! It is insanely delicious and worth being served at any party or get-together!
Prep Time
30 mins
Cook Time
30 mins
Total Time
48 mins
Servings: 6
Calories: 627 kcal
Course:
Appetizer
Cuisine:
French
Ingredients
- 2 heets puff pastry, thawed in the fridge overnight
- 4 cups Sweet Yellow Onions, sliced
- 1 tbsp olive oil
- 2 tsp brown sugar
- 1/2 tsp kosher salt
- 1 cup Gruyere cheese, shredded
- 2 tsp fresh thyme, destemmed and minced
- 2 tbsp heavy cream
Instructions
- Heat oil in a large deep pan on medium-high heat. Add onions and cook for about 10 minutes or until softened and wilted.
- Add the salt and brown sugar and cook uncovered for an additional 20 minutes until the onions are caramelized. Set aside and allow to cool while you prepare the tart. Make sure your onions are cooled enough before you put them on the cold tart.
- Preheat the oven to 400° Fahrenheit.
- Carefully unroll each pastry tart. Place them slightly overlapping on a baking sheet lined with parchment paper. Lightly press the two tarts creating one large rectangular-sized tart. Fold up the sides around the whole tart to create a pretty finished edge. Prick with a fork every inch or so to help prevent bubbling while baking.
- Sprinkle the cheese evenly on the tart.
- Evenly lay the onions on top of the pastry.
- Using 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 until cheese has melted and pastry is crisp. Cool for 5 minutes before cutting into squares or triangles. Garnish with additional thyme leaves if desired.
Cup of Yum
Nutrition Information
Calories
627kcal
(31%)
Carbohydrates
48g
(16%)
Protein
14g
(28%)
Fat
42g
(65%)
Saturated Fat
14g
(70%)
Polyunsaturated Fat
5g
Monounsaturated Fat
22g
Cholesterol
30mg
(10%)
Sodium
560mg
(23%)
Potassium
234mg
(7%)
Fiber
3g
(12%)
Sugar
7g
(14%)
Vitamin A
317IU
(6%)
Vitamin C
9mg
(10%)
Calcium
262mg
(26%)
Iron
2mg
(11%)
Nutrition Facts
Serving: 6Serving
Amount Per Serving
Calories 627
% Daily Value*
| Calories | 627kcal | 31% |
| Carbohydrates | 48g | 16% |
| Protein | 14g | 28% |
| Fat | 42g | 65% |
| Saturated Fat | 14g | 70% |
| Polyunsaturated Fat | 5g | 29% |
| Monounsaturated Fat | 22g | 110% |
| Cholesterol | 30mg | 10% |
| Sodium | 560mg | 23% |
| Potassium | 234mg | 5% |
| Fiber | 3g | 12% |
| Sugar | 7g | 14% |
| Vitamin A | 317IU | 6% |
| Vitamin C | 9mg | 10% |
| Calcium | 262mg | 26% |
| Iron | 2mg | 11% |
* Percent Daily Values are based on a 2,000 calorie diet.