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Home Recipes Breakfast
★★★★★ 5 from 11 Reviews

Caramelized Onion Bacon Gruyere Quiche

1 hr 5 mins
GF Gluten-Free DF Dairy-Free NF Nut-Free
Avatar by: Lindsay Grimes Freedman
April 18, 2015 (Updated: August 20, 2021)
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This is a close up overhead image of a baked quiche. The quiche is in a pie dish and has visible pieces of bacon, onion, and fresh herbs and ground pepper on top. Text overlay reads "caramelized onion bacon quiche."
This is an overhead image of a quiche with pieces of bacon and onion in it. It is baked in a pie dish and sits on a white and tan counter. Text overlay reads "crustless caramelized onion bacon quiche"
This is an overhead image of a baked crustless quiche dish on a white counter. The quiche has bits of chopped herbs and small bowls of mustard and salt to the side.
This crustless Caramelized Onion Bacon Quiche is our family’s favorite brunch recipe! It’s a gluten free and keto quiche loaded with flavor!

You are going to LOVE this crustless caramelized onion and bacon quiche.

I love a good quiche. It may sound weird but it’s my go-to for special occasions. When people have a baby? Quiche them. When there’s some brunch I need to attend? Bring a quiche.

It’s one of those recipes that you can keep in your fridge and cut off slices to heat up as you want.

This quiche is LOADED with all my favorite flavors and is such a decadent breakfast or brunch everyone will love!

This is an overhead image of a baked crustless quiche on a white and tan counter. The quiche has slices cut out and some plated pieces of quiche off to the bottom of the image.

Ingredients for this low carb quiche:

  • Refined coconut oil – butter, ghee or your favorite cooking oil also works!
  • Sweet onions
  • Whole grain mustard – this is the secret ingredient. I know it feels a little weird, but just trust me on this!
  • Eggs – it is a quiche after all!
  • Heavy cream – makes it sooo creamy and decadent, but you can sub in any milk here that you prefer.
  • Gruyere cheese – looove me some Gruyere, but Swiss would be another good option!
  • Bacon – I mean… enough said. But, if you want ot make this a vegetarian quiche, but all means, you can leave it out!
  • Nutmeg – adds a surprising warmth and coziness to the quiche!
  • Salt and pepper
  • This is an overhead image of a pan with sautéed onions and bacon. The pan sits on a white and tan background.
  • This is an overhead image of a quiche dish with some caramelized onion and bacon on the bottom. The dish sits on a white and tan background.

How to make the most delicious crustless quiche:

Cook onions in coconut oil over medium heat for 20 minutes. Cover the pan and stir every five minutes. When the onions have five minutes left to cook, throw in the bacon.

In a large bowl, combine the mustard, eggs, cream, and Gruyere. Set aside a tablespoon or so of Gruyere to sprinkle on the top.

In a pie dish, place half of the onion and bacon mixture. Using a spoon, spread it evenly on the bottom of the dish.

Then, pour the egg mixture. Top with remaining bacon mixture, using a spoon or spatula to dip/press it into the egg. The dish will be much fuller than the picture illustrates.

Sprinkle top with remaining cheese, a couple pinches of nutmeg, salt, and pepper.  Pop it in the oven.

This image is an overhead closeup of a baked crustless quiche. The quiche is topped with ground pepper and chopped herbs.

More quiche and egg bake recipes:

  • Grain Free Asparagus & Goat Cheese Quiche
  • Oven-Baked Eggs in a Muffin Tin
  • Easy Instant Pot Deviled Eggs
  • Roasted Red Pepper Sous Vide Egg Bites
  • Southwestern Sweet Potato Egg Bake
  • Beet Pickled Avocado Deviled Eggs

Did you make this? Leave a review below and tag me on Instagram, Facebook, or Pinterest!

Recipe
GF Gluten-Free DF Dairy-Free NF Nut-Free

Caramelized Onion, Bacon, and Gruyere Quiche

This crustless Caramelized Onion Bacon Quiche is our family’s favorite brunch recipe! It’s a gluten free and keto quiche loaded with flavor!

AvatarRecipe by:Lindsay Grimes Freedman
★★★★★ 5 from 11 reviews
Prep: 30 minsCook: 35 minsTotal: 1 hour 5 mins
Print recipe Rate recipe Pin Save recipe
Servings: serves 8

Ingredients

  • 2 tablespoons refined coconut oil
  • 1 1/2 large sweet onions
  • 4 tablespoons whole grain mustard
  • 4 eggs + 1 yolk
  • 1 1/2 cup heavy cream
  • 1 1/2 cup shredded Gruyere cheese
  • 6 slices of bacon, cut in 1/2″ pieces
  • 2 pinches of nutmeg
  • salt and pepper

Instructions

  1. Preheat oven to 350F.
  2. Cook onions in coconut oil over medium heat for 20 minutes. Cover the pan and stir every five minutes.
  3. Meanwhile, in a large bowl, combine the mustard, eggs, cream, and Gruyere. Set aside a tablespoon or so of Gruyere to sprinkle on the top.
  4. Lie the bacon in a pile, one on top of the other. With a serrated knife, cut them in 1/2″ pieces. Cook the bacon with the onions for the last five minutes.
  5. In a pie dish, place half of the onion and bacon mixture. Using a spoon, spread it evenly on the bottom of the dish. Then, pour the egg mixture. Top with remaining bacon mixture, pushing it a bit into the egg.
  6. Sprinkle top with remaining cheese, a couple pinches of nutmeg, salt, and pepper.
  7. Bake for 35-40 minutes or until top is golden brown.

Nutrition Info:

  • Serving Size: 1 slice
  • Calories: 296
  • Sugar: 1.4g
  • Sodium: 457mg
  • Fat: 24.7g
  • Saturated Fat: 14.2g
  • Unsaturated Fat: 0g
  • Trans Fat: 0g
  • Carbohydrates: 4.2g
  • Fiber: 0.6g
  • Protein: 13.9g
  • Cholesterol: 69mg
© The Toasted Pine Nut

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Recipe rating ★☆ ★☆ ★☆ ★☆ ★☆

  1. AvatarLisa Smith says

    Posted on 7/28/21 at 12:20 pm

    I have made this recipe several times now and it is by far the best quiche I’ve ever had. It’s a big hit with everyone!

    ★★★★★

    Reply
    • AvatarLindsay Grimes Freedman says

      Posted on 7/30/21 at 6:49 am

      I’m so happy you love it! It’s one of my absolute faves!! xo

      Reply
  2. AvatarLisa says

    Posted on 5/7/22 at 5:32 pm

    This recipe is amazing! Sooooo yummy & low carb = so happy! I’ve had many quiche, this one tops all! I could eat this every day…in fact, I made into muffins, so I have been! Ha.

    ★★★★★

    Reply
    • AvatarLindsay Grimes Freedman says

      Posted on 5/12/22 at 10:21 am

      Love the idea of making them into muffins!! So happy you loved them!! xo

      Reply
  3. Avatarevelyn says

    Posted on 5/7/22 at 6:20 pm

    i made this tonight to reheat and serve at a mother’s day brunch i’m hosting. i did use a gluten free crust (i think wholly pie), and because of that i was able to spread the filling between two crusts. bacon, carmelized onion, and gruyere is a great filling for quiche and this recipe did not let me down. i should know, because i went ahead and snuck a piece from the “spare” quiche.

    ★★★★★

    Reply
    • AvatarLindsay Grimes Freedman says

      Posted on 5/12/22 at 10:21 am

      haha always sneak an extra piece!! I’m so happy you loved it!! xo

      Reply
  4. AvatarSandy says

    Posted on 11/8/22 at 8:18 am

    Just for your info, my husband and I live in Switzerland – he is Swiss born and raised. Gruyere (with an accent over “e”) and Swiss cheese are the same!!!! But love oyur recipe!

    You write: Gruyere cheese – looove me some Gruyere, but Swiss would be another good option!

    ★★★★★

    Reply
    • AvatarLindsay Grimes Freedman says

      Posted on 11/9/22 at 12:20 pm

      Yay! I’m so happy you love it – it’s one of my favorite recipes 🙂 In North America Swiss cheese resembles Emmental cheese, has holes, etc. whereas Gruyere is made from whole cow’s milk, aged 6 months + has a stronger flavor, and doesn’t have holes usually. Gruyere is a type of Swiss cheese but not usually considered the same where I live.

      Reply
  5. AvatarEmily says

    Posted on 11/30/22 at 8:25 am

    Can I put this together the night before and bake in the morning??

    Reply
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Lindsay

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I'm Lindsay I love sharing simple, better-for-you recipes. When I'm not in the kitchen, you can find me at the beach watching my kids boogie board and soaking in that warm Cali sun (with sunscreen, of course).

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