To keep crisp cookies crisp all you need is a stapler, a coffee filter, some baking soda, and an air-tight container. I can explain. The baking soda absorbs moisture and the coffee filter is made of a porous material full of tiny holes that lets the air circulate easily and allows the baking soda to absorb any moisture. This is just my easy way of keeping baking soda in the container with your cookies without making a mess. Put about 1/3 cup of fresh baking soda into a coffee filter and staple it closed with two staples, allowing the open edge to get as much air as possible… like this photo below…
Place the stapled coffee filter in an air-tight container (in any position, upright or laying down) with your cookies and you will find them just as crispy the next day.
Also, make sure the freshly baked cookies are completely cooled before storing. Another thing I’ve found is that once you store the cookies in a container alone, with no baking soda, and they get a little soft, my coffee filter/baking soda/stapler method will never bring the crispness back. So make sure they are completely cooled and crisp to begin with and this method will keep them that way for days.
This is how I stored those Crispy Crunchy Oat Cookies I posted the other day. Let me know if you made those cookies and how my coffee filter method worked for you. If you’re going to eat a crisp cookie, they need to hear you crunching across the street! Click here for the recipe for my Crispy Crunchy Oat Cookies. – Jenny Jones