Shelf Life Tips
- The precise answer to the question "How long does powdered sugar last?" depends to a large extent on storage conditions - when properly stored and kept free from contaminants, powdered sugar (also known as confectioners' sugar or icing sugar) has an indefinite shelf life.
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To maximize the shelf life of powdered sugar, store in a cool dry area and keep tightly sealed after opening.
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How long does powdered sugar last at room temperature? When properly stored and kept free from contaminants, powdered sugar has an indefinite shelf life.
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To prevent powdered sugar from hardening once opened, place sugar in a covered airtight container or cover original package with a heavy-duty plastic bag and seal.
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