Just like all homemade food, brownies can go bad. But don't fret, you can refrigerate and or freeze your brownies! I recommend storing your easy brownie recipe in the fridge, it will last about a week in the fridge (if you don't eat them all by then). If you prefer, freeze 1/2 of the brownies... here are the directions: Wrap each brownie individually in parchment paper or cling wrap. Then place homemade brownies in a freezer bag and close, removing as much air as possible. Freeze for up to 3 months.