It depends on your taste. If you're planning on eating them later, you can put them in the freezer and then take them out to take with you. If you're eating them immediately, you can store them in the fridge and take out to eat. If you don't really care about the consistency, then any temp is good. The mint chocolate brownie is good regardless of how it's stored (in my opinion), so I can eat it gooey, chilled, or frozen and I think it's amazing.