Cream Butter and Sugars: In a large bowl, cream together the softened butter, brown sugar, and granulated sugar until light and fluffy.
Add Wet Ingredients: Mix in the sourdough starter, vanilla extract, and eggs until well combined.
Combine Dry Ingredients: In a separate bowl, whisk together the flour, baking soda, baking powder, and salt.
Mix Together: Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Avoid overmixing.
Fold in Chocolate Chips: Gently fold in the chocolate chips.
Ferment Cookie Dough: Place plastic wrap over the top of the bowl and place bowl into the fridge and allow to ferment for at least 12 to 24 hours for best results.
Next Day (12 to 24 hours later):
Scoop Cookies: Using a cookie scoop or tablespoon, drop dough onto the parchment-lined baking sheet, spacing them about 2 inches apart.
Bake: Bake for 10-12 minutes or until the edges are golden brown and the centers are set. They will continue to cook slightly after removing them from the oven.
Cool: Allow the cookies to cool on the baking sheet for about 5 minutes before transferring them to a wire rack to cool completely.
Enjoy: Serve warm or store in an airtight container for a few days.
Store your chocolate cookies in an airtight container or they can be frozen in a freezer-safe bag. Enjoy your homemade chocolate chip cookies!