Food & Cooking Recipes Healthy Recipes Gluten-Free Recipes Passover Powdered Sugar 2.8 (24) By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on October 10, 2019 Print 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. Print