Caramelized Onion Quiche

Rich and creamy quiche with caramelized onions and Gruyere cheese.

Caramelized Onion Quiche
Elise Bauer

Ever wake up in the morning with a craving for a specific food?

This morning it was quiche, specifically an onion quiche. To my dear father who turned up his nose at this masterpiece, mumbling something about real men, I say, "phooey."

Kudos to my brother Ed, who almost made up for dad's transgression, by saying just "damn good" after inhaling a piece at dinner.

Caramelized Onion Quiche

Total Time 0 mins
Servings 6 to 8 servings

Note that although this recipe calls for making a pie crust from scratch, you can easily use an already prepared frozen pie crust. Just pre-bake it using the directions that follow.


  • 1 recipe pie dough (see Pâte Brisée recipe)

  • 2 tablespoons extra virgin olive oil

  • 2 to 3 large red onions (about one pound total), French-cut (see below)

  • Salt and freshly ground pepper

  • 2 teaspoons balsamic vinegar

  • 3/4 cup milk

  • 1/4 cup heavy cream

  • 3 large eggs

  • Pinch nutmeg

  • 6 ounces Gruyère cheese, grated (1 1/2 cups)


Slicing Onions Stem to Root

To caramelize onions, you'll want to slice them lengthwise, or from stem end to root end. That way the onions will hold their shape better during the long cooking involved in caramelizing. (See How to Slice an Onion for more details.)

  1. First, use a sharp knife, get a firm grip on the onion, and slice off the stem end of the onion, by about a 1/2 inch. Cut about 1/8th of an inch from the root end, cutting off the roots, but leaving the core intact. Then place the onion root side up on the board to stabilize it, and cut it in half, straight through the root end.

    Elise Bauer
    Elise Bauer

    2 Peel back the papery skin of the onions. If you want, to keep your cutting area clean, cut off the roots with the skins, but cut only enough to cut off the messy roots. Keep the root end intact. It will make it easier to slice the onion.

    Elise Bauer
    Elise Bauer

    3 With an onion half cut-side down on the board to stabilize it, make angled cuts into the onion, from stem end to root end, cutting to, but not through the root end. Work your way around the arc of the onion, aiming your knife's blade toward the center of the onion.

    Elise Bauer
    Elise Bauer
  2. Make a "V" cut in the root end of the onion to cut out the tough root end, to release the onion slices.

    Elise Bauer

Pre-Bake the Crust

  1. Make a frozen tart crust:

    If you are making your own crust (instead of using an already prepared frozen crust), roll out your dough on a lightly floured surface, into a 12-inch circle. Fit into a 9-by-1 1/2-inch round tart pan (or 9-inch pie dish), pressing dough into corners, extending the edges extra high to allow for shrinkage. Transfer to freezer to chill for 30 minutes.

  2. Line frozen crust with foil and pie weights:

    Preheat oven to 350°F. Line pastry with aluminum foil, pressing into the corners and edges, allowing extra foil on the sides (they'll be your handles when you remove the foil).

    Elise Bauer
    Elise Bauer

    Fill at least two-thirds with baking weights—dried beans, rice, copper pennies, or ceramic or metal pie weights.

  3. Bake with weights:

    Bake first for 15 minutes, remove from oven and let cool a few minutes. Carefully remove aluminum foil and weights.

    Elise Bauer
    Elise Bauer
  4. Remove weights and bake again:

    Poke the bottom of the pie pan with the tines of a fork and return to oven and bake an additional 10 minutes or until lightly golden. (Fork holes are for any air to escape.) Transfer to a wire rack to cool while making filling.

Caramelizing the Onions and Preparing the Quiche

The onions will take about an hour to cook on the stovetop before they are ready to go into the quiche. So timing-wise, if you are making the entire quiche from scratch, it makes sense to get started on the onions once you've put the crust into the freezer to chill before pre-baking.

  1. Caramelize the onions:

    Heat 2 tablespoons of extra virgin olive oil in a large, heavy-bottomed sauté pan on medium heat. Add the onions and sprinkle a little salt over them. Cook, stirring occasionally for 10 minutes, until the onions have softened and are translucent. Reduce the heat to medium low and cook for an additional 40 minutes, stirring occasionally, until the onions are well browned. (See How to Caramelize Onions for more details.)

    Add 2 teaspoons balsamic vinegar and cook for 10 minutes more, until onions are completely caramelized. Remove from heat.

  2. Assemble the quiche:

    Place tart pan on a baking sheet to catch any run-off there might be. Sprinkle half the cheese evenly over the bottom of the crust. Spread onions over the cheese and then top with remaining cheese.

    Elise Bauer
    Elise Bauer

    In a medium bowl, whisk together milk, cream, and eggs. Season with nutmeg, salt, and pepper. Pour over the tart.

    Elise Bauer
    Elise Bauer
  3. Bake the quiche:

    Transfer to the 350°F oven, and bake until just set in the center, 30 to 35 minutes. Cool on a wire rack for about 10-15 minutes before slicing.

Caramelized Onion Quiche
Elise Bauer
Nutrition Facts (per serving)
433 Calories
28g Fat
33g Carbs
13g Protein
Show Full Nutrition Label Hide Full Nutrition Label
Nutrition Facts
Servings: 6 to 8
Amount per serving
Calories 433
% Daily Value*
Total Fat 28g 36%
Saturated Fat 12g 58%
Cholesterol 103mg 34%
Sodium 437mg 19%
Total Carbohydrate 33g 12%
Dietary Fiber 2g 7%
Total Sugars 5g
Protein 13g
Vitamin C 3mg 15%
Calcium 278mg 21%
Iron 1mg 8%
Potassium 221mg 5%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Nutrition information is calculated using an ingredient database and should be considered an estimate. In cases where multiple ingredient alternatives are given, the first listed is calculated for nutrition. Garnishes and optional ingredients are not included.