Sourdough Quiche

Name: Sourdough Quiche
Prep time: 20 min
Cook time: 60 min
Total time: 80 min
Ingredients: sourdough pie crust (recipe linked in blog post); 8 oz thick cut bacon; 1 yellow onion (chopped); 4 large eggs; 1¼ cups whole milk kefir; ¼ tsp salt; dash pepper; dash cayenne; 4 oz farmers cheese

by Kelsey Romano on November 24, 2025

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The sourdough quiche lorraine is what brunch dreams are made of. It has the perfect light and fluffy quiche filling with pieces of crispy bacon, creamy cheese, and caramelized onions inside a flakey sourdough crust. It is truly so easy to make and you’ll feel so accomplished when it’s finished.

Why You’ll Love This Sourdough Quiche

It feels so special and fancy but is so easy to make.
The whole family will love it.
The sourdough crust is perfectly flakey and the quiche filling is so light.
It is versatile! I used the classic quiche lorraine filling but there are endless possibilites.
It makes a great meal prep. This reheats super well making a great meal prep.
It’s great for hosting. This is the perfect dish when you want to impress your guests.

Ingredients & Substitutions

Sourdough pie crust. I used this recipe. You can also use a frozen pie crust.
Thick cut bacon. 8 oz (about 6 slices) of thick cut bacon, diced.
Yellow onion. Caramelized onion adds incredible depth of flavor to the quiche. You can sub shallots.
Eggs. 4 large eggs are needed for the quiche filling.
Kefir. I used kefir for this quiche but you can sub with heavy cream.
Farmers cheese. Farmers cheese is the perfect creamy cheese and adds a boost of protein. You can sub gruyere.
Seasonings. Salt, pepper, and a dash of cayenne are used to season the sourdough quiche.

How to Make it

Step 1

Prep the crust. If making homemade sourdough crust, make the night before. When you are ready to make the quiche, preheat oven to 375. Then butter a pie dish and use your hands to press the dough into the pie plate.

Step 2

Cook the bacon and onions. In a sauté pan over medium heat, cook the bacon, stirring occasionally, until crisp, about 10 minutes. Use a slotted spoon to transfer the bacon to a paper towel-lined plate to drain. Pour off all but one tablespoon of fat from the pan. Add the onions and cook over medium-low heat until soft and translucent, 3 to 4 minutes. Remove from pan and set aside.

Step 3

Make the egg mixture. In a medium bowl, whisk the eggs. Then add kefir and seasonings. Continue whisking until fully combined.

Step 4

Assemble your quiche. Spread the onion evenly over the bottom of the cooked crust. Top with half of the bacon, followed by dollops of farmers cheese, and then the remaining bacon. Pour the egg/kefir mixture over top.

Step 5

Bake your sourdough quiche. Place your pie dish on the middle rack of your oven and cook for about 55-60 minutes, or until the egg mixture is set and the top is golden brown. Remove from oven to let cool for about 5-10 minutes.

Step 6

Serve and enjoy! Serve your sourdough quiche lorraine warm with fresh cracked pepper.

Expert tips

For the best sourdough quiche, serve warm.
You can make ahead of time and reheat it before you host. Simply reheat in the oven at 325 for about 35-45 minutes.
If you use a frozen pie crust, you will need to poke the crust with holes and bake it for about 10-15 minutes before adding the quiche filling.
This recipe is incredibly versatile, add whatever herbs, vegetables, proteins, or cheese you’d like.

What is the best way to serve this sourdough quiche?

Serve warm with fresh cracked pepper. I also love to serve it with a side of lightly dressed greens.

How do I store it?

Store in an airtight container in the fridge for up to 4 days.

Is this good meal prep?

Yes! It is so delicious reheated and makes the best meal prep.

Can I make it ahead of time?

Of course! You can make this recipe a day ahead of time and refrigerate. To reheat, cover the quiche with aluminum foil and heat in a preheated 300°F oven for 35 to 45 minutes, or until hot in the center.