Once the bars are completely cooled, place the unglazed bars in a freezer safe container or zip top bag between layers of wax paper or individually wrapped in plastic. Label and date then freeze. Will last in the freezer for 3-4 months. I leave the glaze off when freezing because it tends to melt and disappear into the bar when the bars thaw. So, I would recommend glazing the bars after you thaw them. To thaw the bars, simply thaw on the counter for a few hours.