Once the blondies are baked, you can wrap the 9 inch square in plastic wrap and then freeze the whole thing to use and enjoy at a later time or if you are serving the next day just keep the blondies wrapped and left at room temperature until you are ready to serve. Store the Soft and Chewy Chocolate Chip Blondies in an airtight container or zip log bag and store on your counter if you have lefter over and want to save them to enjoy throughout the week.