Caramelized Onion Quiche – Rich, Savory & Perfect for Brunch

Caramelized Onion Quiche is a rich and savory dish featuring sweet, golden onions baked into a creamy egg custard inside a flaky pie crust. The slow-cooked onions add deep flavor and natural sweetness, making this quiche a comforting and elegant meal.

Why You’ll Love This Recipe

Ingredients

• 1 pie crust (store-bought or homemade)
• 2 tablespoons olive oil or butter
• 2 large onions, thinly sliced
• 4 large eggs
• 1 cup milk or half-and-half
• 1 cup shredded cheese (Swiss, Gruyère, or cheddar)
• ½ teaspoon salt
• ¼ teaspoon black pepper
• ¼ teaspoon thyme (optional)

Step-by-Step Instructions

1. Preheat oven to 375°F (190°C). Place pie crust in a 9-inch pie dish and set aside.
2. Heat olive oil or butter in a skillet over medium heat.
3. Add sliced onions and cook slowly for 15–20 minutes, stirring occasionally until onions become soft and caramelized.
4. Remove onions from heat and allow them to cool slightly.
5. In a mixing bowl, whisk together eggs, milk, salt, pepper, and thyme.
6. Spread caramelized onions evenly over the pie crust.
7. Sprinkle shredded cheese over the onions.
8. Pour the egg mixture evenly into the crust.
9. Bake for 35–40 minutes, until the center is set and the top is lightly golden.
10. Let the quiche rest for 10 minutes before slicing and serving.

Tips & Variations

• Add sautéed mushrooms or spinach for extra flavor.
• Use Gruyère cheese for a more classic French-style quiche.
• For a lighter option, substitute milk for half-and-half.
• Blind bake the crust for 8 minutes to keep it extra crisp.
• Serve with a fresh green salad for a balanced meal.

Storage & Freezer Instructions

• Store leftover quiche in the refrigerator for up to 4 days.
• Reheat slices in the oven at 350°F (175°C) for about 10 minutes.
• Freeze baked quiche slices for up to 2 months. Thaw overnight before reheating.

Serving & Pairing Ideas

• Serve with a fresh green salad and vinaigrette.
• Pair with roasted potatoes or fruit salad for brunch.
• Enjoy warm or at room temperature for picnics.
• Great alongside soups for a light dinner.

Frequently Asked Questions

Can I make quiche ahead of time?

Yes. Bake the quiche and refrigerate it. Reheat gently in the oven before serving.

How do I keep the crust from getting soggy?

Blind bake the crust for a few minutes before adding the filling, or brush it lightly with beaten egg before baking.

Can I make this quiche crustless?

Yes. Simply pour the filling into a greased pie dish and bake as directed.

What cheese works best?

Swiss or Gruyère are classic choices, but cheddar or mozzarella also work well.

Ready to Make It?

Caramelized Onion Quiche is a comforting yet elegant dish that’s perfect for brunch tables, family meals, or casual gatherings. The combination of sweet onions, creamy eggs, and flaky crust makes every bite delicious.

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