Hi Miss Stern, we'd love to help get you on the right track to using your sourdough starter. It might be best to go over some sourdough basics in our full guide to baking with sourdough to learn how to feed and maintain your starter. Then you can choose to use it in any recipes that call for it, like these. If there's a recipe (like challah) that you'd like to add your sourdough starter to, you can use the guidelines provided here to successfully make the swap. I hope that helps, and happy baking! Kye@KAF

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