This brittle does not keep well. For best results, use this on the day it is made. It will still be fine to consume for a few days, however, the caramel will become a bit weepy. It will start to melt at the edges and on the bottom due to the natural humidity in most kitchens. I have been known to keep this brittle for up to four days (at room temperature, on parchment paper, covered but not air tight). It maintains a good crunch but is sticky to handle.