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Chocolate Chip Sourdough Blondies

Prep Time 10 mins
Cook Time 25 mins
Total Time 35 mins
Course Dessert
Servings 9


  • 6 Tbsp. vegan butter such as Earth Balance
  • 1/4 cup granulated sugar
  • 1/2 cup brown sugar
  • 1 tsp. vanilla extract
  • 1 Tbsp. white vinegar
  • 1 1/2 cups all-purpose flour
  • 1 tsp. baking soda
  • 2 tsp. cornstarch
  • 1 pinch salt
  • 1 cup sourdough starter discard
  • 1 cup semisweet chocolate chips


  • Preheat oven to 350ºF.
  • In the bowl of a stand mixer, cream together the butter and sugars until light and fluffy, about 5 minutes.
  • Add the vanilla extract and vinegar and mix an additional 2 minutes.
  • Sift together the flour, baking soda, cornstarch, and salt. Fold into the wet ingredients.
  • Add the sourdough starter and let the mixer run for 3-5 minutes until the sourdough starter is fully incorporated. Make sure the starter is FULLY incorporated or else the blondies could end up doughy in some parts.
  • Fold in the chocolate chips.
  • Pour the blondie batter into a parchment-lined 8"x8" baking pan and spread the mixture evenly. Bake for 23-25 minutes until golden brown across the whole top.


These blondies tend to sink a tiny bit right in the middle of the pan. But if they sink too much, they're underbaked.