Sourdough Halloween Cookie Recipe: Spooky Decor Ideas

These sourdough Halloween cookies are an ideal spooky-season treat: rich, chocolatey, and decorated with festive sprinkles or candy eyes. Made with sourdough starter or discard, they develop a subtle tang that deepens the chocolate flavor. Crispy at the edges and soft and chewy inside, they’re a hit with both kids and adults and are fun to decorate.

Looking for more sourdough desserts? Try different chocolatey bakes for discard-friendly treats that make excellent additions to your seasonal baking list.

Why You’ll Love This Recipe!

Chewy, soft texture – Melted butter, sourdough starter, and a little cornstarch combine to give cookies crisp edges and a tender, chewy center.

Deep chocolate flavor – Cocoa powder plus chocolate chips or chunks deliver a rich, indulgent chocolate experience in every bite.

Great way to use sourdough discard – Using starter or discard adds a mild tang and extra depth of flavor without changing the familiar cookie experience.

Ingredients

• All-purpose flour
• Cocoa powder
• Baking soda
• Cornstarch – helps keep cookies soft and chewy while helping them hold shape.
• Salt
• Chocolate chips – semi-sweet works well, but use your preferred chocolate.
• Peanut butter chips – optional, add a salty, peanuty contrast.
• Sourdough starter – active starter or discard.
• Butter – melted and slightly cooled; salted or unsalted is fine.
• Brown and white sugar – a mix gives the best texture and flavor.
• Eggs – one whole egg plus one yolk (large).
• Vanilla extract
• Halloween sprinkles and decorations

How to Make Sourdough Halloween Cookies

This recipe is an adaptation of a classic sourdough chocolate chip cookie and benefits from an overnight chill that improves texture and flavor.

1. In a large bowl, whisk together the dry ingredients: flour, cocoa powder, baking soda, cornstarch, and salt. Add the chocolate chips and peanut butter chips and toss so they’re lightly coated in flour. Set aside.

2. In a separate bowl, combine the sourdough starter, melted (but slightly cooled) butter, brown sugar, white sugar, the egg plus egg yolk, and vanilla. Stir until smooth and glossy, resembling runny caramel.

3. Pour the wet mixture into the dry ingredients and fold gently until a cookie dough forms. Do not overmix.

4. Cover the dough and refrigerate for 12–24 hours. Chilling firms the dough so cookies spread less and develops a deeper flavor.

5. When ready to bake, preheat the oven to 165°C (330°F). Line baking sheets with parchment paper.

6. Scoop dough into balls using a cookie scoop or spoon. The recipe yields around 21 cookies using roughly 50–55 g dough balls. Place the balls on prepared sheets and roll or press them into Halloween sprinkles if desired. Add extra chips or candy eyes by pressing them lightly into the dough.

7. Bake at 165°C (330°F) for 12–13 minutes, until the tops are golden but the centers still look slightly soft. Remove from the oven and let cool on the sheet for 10 minutes; they will firm up as they rest. Transfer to a wire rack to cool completely.

How to Store + Freeze

Store cooled cookies in an airtight container at room temperature for 3–4 days. A glass jar helps preserve the chewy texture better than some plastics.

To freeze baked cookies: arrange them in a single layer on a tray and freeze until firm, then transfer to a freezer bag for up to 3 months. Thaw at room temperature.

To freeze dough: portion dough into balls and flash-freeze on a tray. Once firm, store in a freezer bag. Bake straight from frozen—let them sit a few minutes to soften and then bake as directed for fresh cookies anytime.