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If you’re not in a rush and want to take the time for a longer fermentation period, this brown butter sourdough chocolate chip cookies recipe is for you! These cookies are deliciously chewy and well-balanced with notes of nutty brown butter, caramel, vanilla, tangy sourdough, and gooey puddles of chocolate.

What Makes This Recipe Unique
- Long fermentation. There are a ton of quick cookie recipes that use sourdough discard and don’t require a fermentation period. I developed this recipe with a longer ferment to get the health benefits of sourdough in a cookie (because why not?), and also for the tanginess it provides, which helps create a really lovely, nuanced flavor profile.
- Complex, well-balanced flavor. This is no ordinary chocolate chip cookie! Brown butter lends rich notes of caramel and toasted nuts. Sourdough adds tangy flavor and chewy texture. Brown sugar and vanilla create the classic sweet, aromatic flavor profile we love about iconic chocolate chip cookies. And chopped chocolate from a good quality chocolate bar creates luscious chocolate puddles.
- These stay fresher for longer. I haven’t researched the science behind it, but I’ve been experimenting with baking sourdough cookies for the past two years. During that time, I’ve noticed that sourdough cookies stay fresher for longer than regular cookies. (If you know scientifically why this is, please share in the comments below!)

Ingredients
Breaking It Down
Ingredients Explained
In this section I explain the ingredients and give substitution ideas where applicable. For the full recipe (including the ingredient amounts), see the recipe card below.

- Unsalted butter – We start by browning the butter to develop rich, nutty flavor notes.
- Light brown sugar – The molasses adds deep notes of caramel.
- Egg yolk – Adds richness and helps make these cookies extra chewy.
- Vanilla extract – For flavor and aroma.
- Sourdough discard – You can use sourdough starter or discard here, but I prefer the tangier flavor of discard.
- All-purpose flour – The base of this cookie dough.
- Baking powder and baking soda – The leavening agents in these cookies.
- Salt – To season the dough so it isn’t bland, and help create a balanced flavor profile.
- Chopped dark chocolate – If you go with chopped chocolate, you’ll end up with luscious chocolate puddles. Or you can use 3/4 cup semisweet chocolate chips or chunks.
- Flaky sea salt – For topping (optional).
Instructions
1: Brown the Butter

- Add the butter to a small skillet over medium heat.
- Once melted, adjust the heat down to medium-low.
- Let it cook until it butter is light golden brown and smells nutty, about 3 to 4 minutes.
2: Make the Dough, Let it Chill (Cold Ferment), and Bake

- Immediately pour the hot butter into a bowl (scraping up the brown bits on the bottom of the skillet), and stir in the brown sugar until well-combined (it’ll look like wet sand).
- Stir in the egg yolk and vanilla extract, and then stir in the sourdough discard.
- Stir in the flour. Cover the bowl with plastic wrap and chill for at least 2 hours, or up to 12 hours for the best flavor.
- Add the baking powder, baking soda, salt, and chopped chocolate right before you want to bake the cookies. (TIP: I find the easiest way to incorporate these ingredients into the cold dough is by hand. I put on food safe gloves and knead in the baking powder, baking soda, and salt, and then gently fold in the chocolate.)
- Preheat the oven to 350F. If you want easy cleanup, you can line 2 large baking trays with parchment paper. Portion the dough into 16 equal portions (about 2 tablespoons each). Roll the dough into balls, arrange them on the baking trays, and top each with a sprinkle of flaky salt.
- Bake the cookies for 12 minutes, rotating once halfway through. After 12 minutes, remove the trays from the oven and carefully tap each 4 times on a hard surface. Return the trays to the oven and continue baking until the cookies are golden along the outside and on the bottom, and are puffed in the center (about 2 to 4 minutes more). Remove the cookie trays from the oven and carefully tap each 2 times on a hard surface. Let the cookies cool before using a thin metal spatula to remove them.
Storage
Store in an airtight glass container at room temperature for up to 1 week. Or layer the cookies between pieces of parchment paper in an airtight glass container and freeze for up to 3 months.

Chocolate Chips vs Chopped Chocolate
You might think to yourself, how different can it be to use chocolate chips versus a chopped chocolate bar in cookies? Surprisingly, these two chocolate products that may seem similar give very different results!
Chocolate chips keep their structure and don’t melt into chocolate pools the way good-quality chopped chocolate does. This is because chocolate chips typically have less fat (in the form of cocoa butter), and have stabilizers added. Whether you use chocolate chips or chopped chocolate depends on what you’re going for!

Variations
- Chocolate chips – For more traditional chocolate chip cookies, opt for chocolate chips instead of a chopped chocolate bar. Use semisweet chocolate chips for classic flavor, or switch it up and go for dark chocolate, milk chocolate, or even white chocolate!
- Nuts – I am a huge fan of nuts in my chocolate chip cookies (especially walnuts), but sometimes I just want them nut-free. Depending on what you’re in the mood for, feel free to add up to 3/4 cup of your favorite chopped nuts, such as walnuts, pecans, hazelnuts, almonds, pistachios, etc. to this recipe.
- Dried fruit – You can add up to 3/4 cup of any kind of dried fruit you like, such as raisins, cherries, apricots, figs, blueberries, you name it! Just make sure it’s chopped into small (raisin-sized) pieces if you’re using something bigger like dried apricots.
Tips For the Best Sourdough Chocolate Chip Cookies
- Once the butter is browned, it’s important to immediately mix it with the brown sugar. We want the butter to be hot so that it fully dissolves the brown sugar.
- You don’t have to go the full 12 hour fermentation period. However, for the right texture, this cookie dough needs at least 2 hours to chill before baking to firm up the butter and hydrate the flour.
- To get the right flavor, texture, and rise, don’t add the baking powder, baking soda, and salt until right before you’re ready to bake the cookies. (TIP: I find the easiest way to incorporate these ingredients into the cold dough is by hand. I put on food safe gloves and knead in the baking powder, baking soda, and salt, and then gently fold in the chocolate.)

Frequently Asked Questions
Yes! Unlike regular cookies, the flavor of sourdough cookies is complex and nuanced, not just purely sweet. In this recipe, sourdough’s tartness balances brown sugar’s sweetness, and nutty brown butter adds richness.
It adds subtle tangy flavor and makes these cookies super chewy inside and crispy outside.
Either will work fine, but I prefer sourdough discard for tangier flavor here.
Yes. However, if you do, I recommend using sourdough starter instead of discard so your cookies aren’t overly tangy.
If You Keep Sourdough Starter on Hand, You Don’t Want to Miss These Recipes
- Baked Peanut Sticks (Donuts)
- Sourdough Detroit Style Pizza
- Easy Sourdough Pasta
- Sourdough Discard Protein Bagels With Greek Yogurt

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Sourdough Chocolate Chip Cookies Recipe
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Ingredients
- 1/2 cup unsalted butter
- 1 1/4 cups light brown sugar
- 1 large egg yolk
- 2 teaspoons pure vanilla extract
- 1/2 cup sourdough discard or active starter (see Notes)
- 2 cups all-purpose flour
- 3/4 teaspoon baking powder
- 3/4 teaspoon baking soda
- 3/4 teaspoon salt
- 100 g chopped dark chocolate (or 3/4 cup semisweet chocolate chips or chunks)
- Flaky sea salt for topping (optional)
Instructions
- Brown the butter. Add the butter to a small skillet over medium heat. Once melted, adjust the heat down to medium-low, and let it cook until it butter is light golden brown and smells nutty, about 3 to 4 minutes.
- Make the dough. Immediately pour the hot butter into a bowl (scraping up the brown bits on the bottom of the skillet), and stir in the brown sugar until well-combined (it’ll look like wet sand). Stir in the egg yolk and vanilla extract, and then stir in the sourdough discard. Stir in the flour.
- Chill. Cover the bowl with plastic wrap and chill for at least 2 hours, or up to 12 hours for the best flavor. Add the baking powder, baking soda, salt, and chopped chocolate right before you want to bake the cookies. (TIP: I find the easiest way to incorporate these ingredients into the cold dough is by hand. I put on food safe gloves and knead in the baking powder, baking soda, and salt, and then gently fold in the chocolate.)
- Bake. Preheat the oven to 350F. If you want easy cleanup, you can line 2 large baking trays with parchment paper.Portion the dough into 16 equal portions (about 2 tablespoons each). Roll the dough into balls, arrange them on the baking trays, and top each with a sprinkle of flaky salt.Bake the cookies for 12 minutes, rotating once halfway through. After 12 minutes, remove the trays from the oven and carefully tap each 4 times on a hard surface. Return the trays to the oven and continue baking until the cookies are golden along the outside and on the bottom, and are puffed in the center (about 2 to 4 minutes more).Remove the cookie trays from the oven and carefully tap each 2 times on a hard surface. Let the cookies cool before using a thin metal spatula to remove them.
Notes
- Sourdough Discard or Active Starter: Either will work fine, but I prefer sourdough discard for tangier flavor here, and I let the dough cold ferment for 12 hours.
- If You Want to Let the Dough Cold Ferment for 24 Hours: I recommend using sourdough starter instead of discard so your cookies aren’t overly tangy.
- Storage: Store in an airtight glass container at room temperature for up to 1 week. Or layer the cookies between pieces of parchment paper in an airtight glass container and freeze for up to 3 months.
Nutrition
Nutritional information is automatically calculated and should be used as an approximate.
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I’m the writer, recipe developer, photographer, and food stylist behind this blog. I love finding the human connection through something we all do every day: eat! Food is a common ground that we can all relate to, and our tables tell a story. It’s my goal to inspire you to get in the kitchen, try something new, and find a favorite you didn’t know you had.
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