Cozy Christmas Caramelized Onion Quiche Recipe
This Cozy Christmas Caramelized Onion Quiche is a festive and comforting savory tart featuring sweet caramelized red onions, nutty Gruyère cheese, and a smooth custard filling baked in a flaky homemade pie crust. Perfect for holiday brunches or cozy winter dinners, this quiche combines rich, deep flavors with a tender, buttery crust.
- Prep Time: 20 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour 5 minutes
- Yield: 6 servings 1x
- Category: Main Dish
- Method: Baking
- Cuisine: French
- Diet: Vegetarian
Ingredients
Scale
Pie Crust
- 1 recipe pâte brisée (pie dough)
Filling
- 2 to 3 large red onions (about 1 pound total)
- 2 tablespoons extra virgin olive oil
- Kosher salt, to taste
- Freshly ground black pepper, to taste
- 2 teaspoons balsamic vinegar
- 6 ounces Gruyère cheese, grated (1 1/2 cups)
- 3/4 cup milk
- 1/4 cup heavy cream
- 3 large eggs
- Pinch of nutmeg
Instructions
- Prepare the onions: Peel and thinly slice the red onions. Heat the extra virgin olive oil in a large skillet over medium-low heat. Add the sliced onions, a pinch of kosher salt, and cook slowly, stirring occasionally, until onions are deeply golden and caramelized, about 30 to 40 minutes. Towards the end, stir in the balsamic vinegar and cook for an additional 2 minutes. Remove from heat and let cool slightly.
- Prepare the pie crust: Roll out the pâte brisée dough on a lightly floured surface to fit a 9-inch tart or quiche pan. Press the dough into the pan, trim the edges, and prick the bottom with a fork to prevent bubbling.
- Preheat the oven: Set your oven to 375°F (190°C) to preheat.
- Assemble the quiche: Spread the caramelized onions evenly over the pie crust. Sprinkle the grated Gruyère cheese on top of the onions.
- Make the custard filling: In a mixing bowl, whisk together the eggs, milk, heavy cream, a pinch of kosher salt, freshly ground black pepper, and the pinch of nutmeg until fully combined and smooth.
- Pour and bake: Pour the custard mixture over the onions and cheese in the crust. Bake the quiche in the preheated oven for 35 to 45 minutes, or until the custard is set and the top is golden brown. A knife inserted into the center should come out clean.
- Cool and serve: Remove the quiche from the oven and let it cool for at least 10 minutes before slicing. Serve warm or at room temperature for the best flavor.
Notes
- You can substitute yellow onions for red if preferred, but red onions provide a sweeter, milder flavor when caramelized.
- Make sure to caramelize the onions slowly over low heat to develop maximum sweetness and avoid burning.
- The quiche can be made a day ahead and reheated gently in the oven before serving.
- For a crispier crust, blind bake the pie dough for 10 minutes before adding the filling.
- To make this dish vegetarian, ensure the pie dough contains no animal fats.
Keywords: caramelized onion quiche, holiday quiche, Gruyère quiche, Christmas brunch recipe, savory tart