Moisture softens peanut brittle, robbing it of that signature crunch, so always store the candy in a completely dry, airtight container. Any plastic container or glass jar with a tight-fitting lid is fine. Ziplock plastic storage bags work, too.
How do you keep brittle crunchy?
Add 1 tbsp. baking soda for each cup of the sugar syrup. This injects millions of tiny bubbles into the candy, making it more delicate and crisp as it hardens later on.
How long can you store brittle?
Wrap tightly and store in an airtight container at room temperature. Proper storage should keep brittle fresh for up to two months—if you can resist eating it all at once!