Quiche with Caramelized Onions

Spinach quiche with caramelized onions is as creamy as custard.  Baked in the flakiest herbed crust that will melt in your melt. Great for a Spring brunch or to chase away the winter blues.
A slice of quiche with caramelized onions

Quiche is one of my favorite brunch foods but when ordering it out, I’m rarely impressed with the crust. I normally just eat around it.  I’m also kind of picky about what I put in my quiche. I don’t want harsh red peppers but everyone wants to throw them in. I think that a quiche is the perfect breakfast/brunch food to serve for guests. Yes it has to cook for about 40 minutes but you can do all the prep ahead of time and it doesn’t have to be eaten the minute it comes out of the oven.  You can have it all by itself or it’s easy to add fruit or biscuits if you have a really hungry crowd.


The flavors in this version are one of my favorites, sautéed spinach and mushrooms, caramelized onions and a variety of cheeses.  The last time I made this we had house guests. So the morning before, I prepped the ingredients.  While the onions were caramelizing, I made the pie crust and sautéed the spinach and mushrooms.  Once cool, I just put them all in the refrigerator.  When I was ready to make the quiche the next morning, I just had to roll out the pie crust and dump everything in.

Quiche with caramelized onions in a pie dish

I used my tried and true recipe for pie crust using butter alone but also added some dried thyme and basil.  I rolled it out first thing in the morning and put it in the refrigerator. I went for a run and when I got back, I added the quiche ingredients and put it in the oven.  I had plenty of time to get ready while it was baking.


How do you make quiche:


For any quiche if you want it custardy you are going to have to use at least a little cream. Fat free milk will not give you that custard like texture.  You don’t have to use all cream though, you can use some whole milk.  I like to use at least half heavy cream and then milk for the rest. To get perfect quiche every time, I add six egg yolks to a measuring bowl and fill it up with your milk mixture so that you have a total of three cups. It’s generally about 1 1/2 cups of cream.  Then you can add anything you like for seasonings and fillings. I almost always add some fresh nutmeg, I just love the flavor it adds to the egg mixture.


Since every oven is different and the ingredients you add may affect the cooking time, you just need to check this after about 30 minutes.  You’ll know it’s done when the center doesn’t jiggle when you shake the pie pan.

A slice of Quiche with Caramelized Onions

This is easily adaptable to any ingredients you like, a little bacon or sausage is never a bad choice. You also can do this without a crust at all, just spray the pie pan with cooking spray.  Now that you know how to make the perfect custard base, have fun experimenting with your ingredients. It’s a great way to clean out your refrigerator.


Quiche with Caramelized Onions

A slice of quiche with caramelized onions

Spinach quiche with caramelized onions is as creamy as custard.  Baked in the flakiest herbed crust that will melt in your melt. Great for a Spring brunch or to chase away the winter blues.

  • Author: Barbara Curry
  • Prep Time: 30 minutes
  • Cook Time: 40 minutes
  • Total Time: 1 hour 10 minutes
  • Yield: 8


  • 1-2 4 cups onions, sliced and cut into 1 inch pieces
  • 1 tablespoon olive oil
  • 1 tablespoon butter
  • ½ teaspoon salt
  • pinch sugar
  • 2 cloves garlic
  • 1 tablespoon olive oil
  • 2 tablespoons butter
  • 5 cus baby spinach
  • 8 ounces mushrooms, sliced
  • 6 eggs
  • 1 ½ cups cream/milk
  • 1 cup gruyere, grated
  • 1 cup cheddar cheese, grated
  • salt and pepeper
  • nutmeg


1. Preheat oven to 400º. Roll out pie crust and place in deep dish pie pan, Prick with a fork and refrigerate while preparing quiche.

2. Add 1 tablespoon olive oil and 1 tablespoon butter to a large skillet with a lid over medium heat. Add onions and toss in oil. Cover and let simmer for 15 minutes. Remove lid and add salt and sugar. Cook an additional 15 minutes or until golden brown. Set aside.
3. In a separate skillet add 1 tablespoon olive oil and 1 tablespoon butter and heat over medium heat. Add garlic and saute for about 1 minute. Add spinach and a pinch of salt and cook until wilted, about 3 minutes. Remove from pan. In the same pan, add 1 tablespoon butter and saute mushrooms until browned, about 3-5 minutes.
4. Add eggs to a large measuring bowl and add enough cream/milk so that the total volume is 3 cups. Whisk until well combined. Add cheese, onions, mushrooms, and spinach. Season with salt and pepper and nutmeg.
5. Pour into prepared pie crust. Turn oven down to 375º and bake for 40-50 minutes until center no longer jiggles.


You can make this without a pie crust, just spray the pan with cooking spray first.


3 Responses to Quiche with Caramelized Onions

  1. chery April 20, 2018 at 10:59 am #

    Perfect description of the best way to make quiche! Anything with caramelized onions works for me. Your writing just inspires me!

  2. Nancy May 27, 2018 at 9:41 am #

    The best quiche I have ever made or been served…crust recipe meets all of my expectations of a perfect crust. Can’t wait to try it in a double crust recipe!! Love your blog!

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