Food & Cooking Recipes Healthy Recipes Gluten-Free Recipes Passover Powdered Sugar 2.8 (24) Add your rating & review By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on October 10, 2019 Print Rate It Share Share Tweet Pin Email Yield: 1 scant cup Because confectioners' sugar contains cornstarch, it is not kosher for Passover. This clever recipe makes a fine substitute to top dessert. Ingredients 1 tablespoon potato starch 1 cup granulated sugar Directions In a food processor, combine potato starch and sugar. Process until mixture is very powdery and resembles confectioners' sugar, about 2 minutes. Allow to settle for about 1 minute before removing processor cover. Rate it Print