Caramelized Onion Bacon Gruyere Quiche
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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!

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
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.

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

Caramelized Onion, Bacon, and Gruyere Quiche
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Prep Time: 30 mins
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Cook Time: 35 mins
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Total Time: 1 hour 5 mins
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Yield: serves 8 1x
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Category: breakfast
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Method: oven
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Cuisine: quiche
- Diet: Gluten Free
Description
This crustless Caramelized Onion Bacon Quiche is our family’s favorite brunch recipe! It’s a gluten free and keto quiche loaded with flavor!
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
- Preheat oven to 350F.
- Cook onions in coconut oil over medium heat for 20 minutes. Cover the pan and stir every five minutes.
- 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.
- 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.
- 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.
- Sprinkle top with remaining cheese, a couple pinches of nutmeg, salt, and pepper.
- Bake for 35-40 minutes or until top is golden brown.
Nutrition
- 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
Keywords: quiche, quiche recipe, bacon quiche, crustless quiche, low carb quiche, keto quiche, gluten free quiche, crustless quiche recipe, quiche with no crust, bacon and onion quiche, bacon quiche, bacon quiche recipes, bacon quiche keto
Let me know how much you love this in the comments below!! xo
Love a good quiche like this! Especially when it contains gruyere.. my all time favourite cheese!
Me too! Gruyere is too good!
I have so many backyard eggs and i’ve been looking for some different egg-heavy recipes to use them up! This looks amazing. Literally heading to the store now to get some Gruyere! Thanks for the recipe 🙂
Yay! let me know how you like it!! How many chickens do you have? It sounds so fun!!
I made this tonight and everyone, including my two kids who never seem to like the same meal, raved about this! No leftovers, amazing!
Thanks for sharing
LOVE hearing that!!! Thanks so much for the feedback Roy!
4 tablespoons mustard?? Seems like a lot. I want my hubby’s response to be the same as yours 🙂
haha you can always add less if you’re not so into mustard 🙂 It’ll be delish either way!! xo
Yeah 4 tbsp was a bit too much for my liking. It was very good though. Next time I will add maybe 3. Very tasty though
On second thought maybe 4 tablespoonful is good. Maybe I didn’t mix it well. Because some pieces are over mustardy. And some not so much. So I guess just make sure you mix it well
Ohh interesting! Yeah I think it’s just playing around to see what a good mustard measurement is for your taste. I’m so glad you liked it!! xo
I have a 9/9.5 inch diameter glass Pyrex dish – would that work for this recipe?
I feel like it may be a good option! I haven’t tried it in anything other than a pie/quiche dish, so I don’t know how the timing would work out. But I think it would be delicious! xo
Love this recipe, so rich!
★★★★★
ahh yay!! I’m so happy you loved it too!! xo
The only issue I have with this recipe is that I made it to have breakfast prepared for the week but I find myself wanting to have a slice for every meal! The thing that took it over the top was the sprinkle of nutmeg to finish it off. I’m always hesitant with nutmeg due to having a few dishes where the cook went overboard with it and all I could taste was nutmeg, but that little dusting just before baking took this quiche over the top! Very delicious!
★★★★★
haha yay!! I’m so happy you enjoyed it!! xo
Can I use organic coconut oil or olive oil instead of refined coconut oil?
Yes that should be fine 🙂 hope you love it!!
Hi! Would you recommend a bacon substitute if making this for someone who does not eat pork/red meat? Is it safe to just leave that out? And how would it taste if replaced with hash browns?
★★★★★
Hi!! I kinda love the idea of using hash browns! Maybe sauté them for a bit to get some yummy golden bits that may be similar to a bacon crunch. Otherwise, you can just leave the bacon out and it’ll be tasty, cheesy, onion yumminess 🙂
Big Hit!! I made one with a crust and one crustless. A couple of pantry changes: I used shallots in olive oil and added broccolini. Dee-lish!
★★★★★
Sounds so delish!! I’m glad you enjoyed!! xo
Am I able to make this ahead and freeze it or stick it in the fridge?
If I freeze it should it be before or after it cooks? I’m planning a girl’s weekend and I want to make breakfast an easy thing instead of having to wake up and make it.
Honestly I don’t know about freezing it, I’ve never tried! I’m a little worries it may get icy, but if you give it a shot, let me know how it goes!! xo
This recipe is one of our favorites, we always make it with crust. We have started to do an “onion medley” by caramelizing red onion, yellow onion, and shallots. This recipe is our happy food!
★★★★★
Loooove the idea of onion medley! I can’t wait to try it!! xo
I NEVER comment on blogs, websites, forums whatever, but I was compelled to get the word out about the deliciously awesome recipe. So so so good!
Made it this morning for Christmas brunch and everyone loves it! You’ll be scraping the sides and bottom eating every morsel you can find. Thank you for sharing!
I double the recipe and made one large one… perfecto
One more time…ITZA GOOD!!
★★★★★
Yay!! Thanks so much for your comment!! I’m so happy you love it – it’s one of my faves!! xo
I sautéed in GF butter instead, added cognac right before the bacon let that absorb a few minutes then added the bacon and turned up on high to crisp up for about 7 mins. I used 1/2 amount of mustard and mixed in nutmeg, salt, pepper and all cheese (by accident). Follow instructions for layering but used a pate brisee crust that I baked off yesterday. Had to bake about 40-45 minutes to set – last 20 minutes st 375. Every oven is different lol!
I also used equal parts smoked gruyere and regular gruyere.
EXCEPTIONAL
★★★★★
Yay! I’m so happy you loved it!! xo