Sourdough Chai Cookies with Coffee Buttercream

These sourdough chai cookies with coffee buttercream are soft, chewy, warmly spiced, and topped with fluffy coffee frosting for the perfect dirty chai latte flavor. Made with sourdough discard, homemade chai spice, egg yolks, and a cinnamon sugar coating, these cozy chai cookies bake up with slightly crisp edges and gooey centers. If you love a chai tea latte or dirty chai latte, this from-scratch sourdough cookie recipe is the perfect fall dessert! This is an easy, no-chill recipe that you’ll be repeating all season long.

Essentials for the Perfect Sourdough Cookie

• Digital Kitchen Scale: In my kitchen, a digital scale is a non-negotiable! I have had this exact digital scale for years, and it has never failed me! Measuring by weight is the only foolproof way to ensure accuracy, especially for flour and sourdough starter which are often difficult to measure and can make or break the final texture of the cookies.
• Stand Mixer: A quality stand mixer is a game changer for sourdough cookies. It helps combine the thick dough with ease without over-mixing, which is key for a tender crumb!
• Large Cookie Scoop: Most of my sourdough cookie recipes are designed for making jumbo cookies. Using a large cookie scoop ensures that you get the bakery-style size with even baking every time!

Ingredients

Sourdough Chai Cookie Ingredients

• 1 cup light brown sugar, packed (220g): Pack it tight for the best chew and a perfect spread!
• 2 tbsp granulated sugar (25g): Balances moisture for slightly crisp edges while maintaining the chewy center.
• ½ cup salted butter, softened (113g): Use “dent soft” butter, meaning it should indent with resistance when pressed, remaining cool to the touch and not shiny or oily. This usually takes 30–60 minutes at room temperature. To use unsalted butter, add ¼ tsp additional salt.
• ½ cup sourdough starter, active or discard, stirred down (150g): Active or discard starter works! Stir it down well before measuring by volume. For best accuracy, measure by weight.
• 2 large egg yolks (40g): Yolks only (skipping the egg white) give the cookies a gooey, dense center that is never cakey.
• 2 tsp vanilla extract (10g): Pure vanilla extract provides the cleanest, best flavor.
• 5 tsp chai spice (12g): You can use store-bought chai spice, but I prefer to make my own by combining 1 tsp ground ginger, 1 tsp cardamom, 1½ tsp ground cinnamon, ½ tsp ground cloves, ½ tsp ground nutmeg, ½ tsp ground allspice, and a pinch of black pepper. This makes the 5 tsp needed for the cookie dough.
• ½ tsp salt (3g): Sea salt is preferred over iodized salt for a cleaner flavor.
• 1½ cups all-purpose flour, scooped (not spooned or sifted) (235g): I designed this volume measurement to be scooped directly out of the bag (not sifted or spooned and leveled). Pro Tip: For the best accuracy and overall cookie texture, measure flour by weight.
• 1 tsp baking soda (6g): Ensure you are using baking soda, not baking powder. They’re not interchangeable here.
• ¼ cup cinnamon sugar: To make this, just mix ¼ cup granulated sugar with ½ tsp ground cinnamon (or additional chai spice) in a small bowl. We will roll the cookies in this mixture for the perfect sourdough chai snickerdoodle flavor!

Coffee Buttercream Ingredients

• 1½ tbsp instant coffee: You can use your favorite instant coffee, or even instant espresso if you want a stronger coffee-forward flavor! Decaf instant coffee is also an option if you’re concerned about the caffeine content.
• 1 tbsp hot water (15g): It can be hot but doesn’t need to be boiling. We just need the instant coffee to dissolve into it easily.
• 1 cup salted butter, softened (226g): It is best to make sure the butter is softened enough that it will whip smoothly without chunks. If you want to use unsalted butter, add ¼ tsp. additional salt to the recipe.
• 2 cups powdered sugar (250g): If you use less, the buttercream may be too soft. Add cornstarch (½ tbsp at a time) only if needed to thicken it without adding more sweetness.
• ½ tsp vanilla extract (3g): Pure vanilla extract is best! Imitation vanilla often contains unnecessary additives.
• ½ tsp ground cinnamon (1g): You can use ground cinnamon, or swap it for chai spice for the perfect dirty chai buttercream frosting!
• Pinch of salt: I prefer to use sea salt over iodized salt for a cleaner flavor profile.

How to Make Sourdough Chai Cookies

Step 1: Preheat Oven & Prep

Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.

Step 2: Cream the Butter & Sugars

Beat the brown sugar, granulated sugar, and softened butter until the texture is creamy, uniform, and slightly aerated. If you see chunks of butter, keep mixing! This works best with a stand mixer (paddle attachment) or a handheld electric mixer.

Step 3: Add the Wet Ingredients

Add the sourdough starter, egg yolks, vanilla extract, chai spice, and salt. Beat until smooth and slightly frothy. Pro Tip: Scrape down the sides of the bowl to ensure the starter is fully incorporated with no streaks remaining.

Step 4: Incorporate the Dry Ingredients

Add the flour and sprinkle the baking soda evenly over the top. Turn the mixer to low speed and stir until just combined. Critical Step: Stop mixing as soon as the flour is mostly incorporated. A few tiny streaks are okay because they will finish mixing as you scoop the dough. Over-mixing here develops too much gluten, making cookies tough rather than chewy.

Step 5: Prepare Sugar for Rolling

In a shallow plate or bowl, stir together the granulated sugar and cinnamon (or chai spice).

Step 6: Scoop & Roll

Portion the dough into large scoops using a cookie scoop or spoon (3 tbsp / 70g each). Roll each scoop in prepared cinnamon sugar until all sides are coated generously. Place 6 scoops per baking sheet to allow space for spreading.

Step 7: Bake

Bake for 12–15 minutes, rotating the pan halfway through. Remove when the edges are set and slightly golden but the centers still look soft. Pro Tip: Immediately after removing the pan from the oven, firmly tap it on the stovetop a few times to deflate the cookies. This creates a denser, gooier texture. Bake in batches. Recipe makes about 12 cookies.

Step 8: Cool On Baking Sheet

Allow cookies to set on the hot baking sheet for 7 minutes before transferring to a wire rack. Moving them too early may cause them to fall apart. Allow cookies to cool completely before frosting.

How to Make the Coffee Buttercream

Prepare the Coffee Concentrate: Stir the instant coffee into the hot water until completely dissolved. Then set aside to cool completely while moving on to the next steps.

Cream the Butter: In a stand mixer fitted with a whisk attachment, beat the softened butter on high speed for 5-7 minutes, until it is very pale and fluffy. It should be light as air. Scrape down the sides of the bowl.

Incorporate the Remaining Ingredients: Add powdered sugar, vanilla extract, cinnamon, and salt. Mix on low speed until the powdered sugar begins to incorporate (go slow to prevent a cloud of powdered sugar!). Then scrape the bowl, add the prepared coffee concentrate, and beat on high speed for an additional 3-5 minutes until the coffee buttercream is ultra light and fluffy!

Check Consistency: If the frosting is too thick, mix in milk (1 tsp at a time) until the desired consistency is reached. If it’s too thin, add more powdered sugar (1 tbsp at a time).

Storage Tips

• Storing Unfrosted Cookies: Once completely cool, you can store unfrosted cookies in an airtight container or bag for up to 5 days at room temperature. Note that the cookies may crumble as the days go on. Pro Tip: To ensure they stay fresh the longest, place a slice of bread in the container with the cookies. The cookies will absorb moisture from the bread (the bread will become rock hard!), keeping your cookies soft for longer.
• Storing Frosted Cookies: The buttercream will dry somewhat to the touch, but it is still recommended that you store these cookies in a single layer rather than stacking them. Frosted cookies are safe for up to 2 days at room temperature, or 5 days in the fridge!

Why This Recipe Works

No fall season feels complete without at least one chai dessert, and these sourdough chai cookies with coffee buttercream are such a cozy one. The cookies bake up soft and chewy with lightly crisp edges, warm chai spice, and just enough sourdough discard to add depth without making them taste sour.

The coffee buttercream adds a fluffy, creamy topping with that coffee-shop dirty chai flavor, but the cookies are delicious with or without it. If you prefer a simpler chai cookie, you can skip the frosting entirely and still end up with a soft, chewy, warmly spiced sugar cookie.

The texture works because this recipe uses egg yolks instead of whole eggs, which keeps the centers dense and chewy instead of cakey. The chai spice brings warmth and depth without overpowering the cookie, and the cinnamon sugar coating gives the edges just enough sparkle and crunch.

The Sourdough Cookie Lady Tips

• Make your own chai spice. The ingredient list includes the exact chai spice blend I use for the cookie dough. It is slightly cinnamon-forward, with plenty of cardamom and ginger, plus a pinch of black pepper for warmth and depth. Making your own gives you a more balanced, controlled flavor that is more authentic than many store-bought blends.
• Beat the buttercream extensively. For the lightest, fluffiest coffee buttercream, beat the butter until it is very pale and airy before adding the remaining ingredients. A stand mixer makes this much easier and gives the buttercream the best texture for topping these soft sourdough chai cookies and giving them that classic dirty chai flavor.
• Let the butter become “dent soft.” To keep this a no-chill recipe, the butter should be soft enough to press into while still cool and slightly resistant, not melted, shiny, or oily.
• Use only the egg yolks. Whole eggs add too much moisture and can push the cookies toward a cakey texture. Egg yolks help keep the centers dense, soft, and chewy.
• Measure the flour by weight if possible. Sourdough cookie dough is sensitive to extra moisture, so an accurate flour measurement makes a big difference in the final texture.
• Tap the pan after baking. Tapping the pan right after baking helps deflate the centers slightly for a denser, gooier bite.

Frequently Asked Questions

Will these cookies taste sour?

No, these cookies should not taste sour. The sourdough discard works more like a flavor enhancer, adding subtle depth that balances the sweetness and warm chai spices. For the mildest flavor, use starter or discard that has been fed within the last two weeks. If you prefer a more complex, tangy flavor, use the long-fermented option and refrigerate the dough for 1–3 days before baking.

Can I use active starter instead of discard?

Absolutely! Both active starter and sourdough discard work well in this recipe. Since the baking soda handles most of the leavening, active starter will not change the rise much. The main difference is flavor: active, recently fed starter usually gives the cookies a slightly milder sourdough flavor.

Why did my cookies come out cakey instead of chewy?

Cakey cookies are usually caused by too much flour or over-mixing the dough. For that dense, gooey, chewy texture, weigh your flour in grams and stop mixing as soon as the flour is mostly incorporated. Over-mixing develops too much gluten, which can make the cookies tougher and more bread-like instead of soft and chewy.

Do I have to chill the dough before baking?

No, this is a no-chill sourdough cookie recipe, so you can bake the cookies right away. For deeper flavor and a long fermentation option, you can cover and refrigerate the dough for 1–3 days. If you chill the dough, let it sit at room temperature for about 1 hour before scooping and baking so the cookies can spread properly.

Can I freeze sourdough cookie dough?

Absolutely! For best results, follow this flash-freezing method:

1. Scoop: Portion the sourdough chai sugar cookie dough into balls (3 tbsp / 70g each) and place them on a parchment-lined baking sheet. They can be close together, but make sure they are not touching.
2. Flash Freeze: Place the sheet in the freezer for about 1 hour, or until the dough balls are firm to the touch.
3. Store: Transfer the frozen dough balls into a gallon freezer bag. They can be stored in the freezer for up to 3 months!

Pro Tip: Double the recipe to intentionally freeze an extra batch! This provides you with ready-to-bake chai sourdough cookies for when that sweet tooth hits.

Tips For Baking Frozen Dough:

Thaw Partially: For best results, allow frozen dough to sit at room temperature for 30–60 minutes, then roll in cinnamon sugar immediately before baking. This helps achieve a texture and baking time nearly identical to a fresh batch of dough.

Potentially Increase Bake Time: You may need to add 1–2 minutes to the baking time if the dough is still colder than fresh dough would be.

How to Make Long-Fermented Sourdough Chai Sugar Cookies

To long-ferment the dough for deeper flavor and a slower fermentation option that some bakers prefer for digestibility, follow these simple directions:

1. Prepare: Follow the recipe directions to make the dough.
2. Cold Ferment: Cover the bowl with plastic wrap, or transfer to an airtight container. Refrigerate for 1–3 days. Note: After the first day, many bakers prefer a longer fermentation, but it also intensifies the tangy flavor.
3. Bring to Room Temp: The dough temperature will significantly affect the final texture of your cookies. For the perfect chewy cookie, remove the dough from the fridge about 1 hour before scooping.
4. Scoop & Bake: Once the dough has come almost to room temperature, scoop (3 tbsp / 70g each), roll in cinnamon sugar, then bake as listed in the directions! Troubleshooting: If your cookies turn out more cake-like instead of chewy, it was likely due to a dough temperature that was still too cold.

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