After you scoop out some ice cream from the tub and put it back in the freezer, it’s common to get a layer of ice crystals on top. The easy way to avoid that, says AO Life, is to cover the ice cream with parchment paper.
The idea is similar to storing your ice cream in freezer bags, and just like that, it isn’t going to entirely stop ice crystals over several days of non-usage. But it should slow down the formation sufficiently till you reach in for another scoop. Another advantage of this method is that it also stops the ice cream from absorbing freezer odors, says Epicurious.
This is also a neat way to reuse the scrap parchment paper that you may have cut out for your baking. No need to throw it away the next time!
AO Hacks: Tips For Your Freezer | AO Life