Prevent cookie dough from drying out by covering it with plastic wrap while it is chilling in the refrigerator. Freeze the cookie dough in an airtight plastic storage container. If air exposure has made your dough dry and hard to handle, you can restore it to an ideal texture with the help of a few ingredients. Dry dough will result in crumbly cookies so it's important to soften it before you begin the baking process.
Allow chilled or frozen cookie dough to warm to room temperature.
Place the cookie dough on a lightly floured surface, such as a counter top or baking sheet.
Knead 2 tbsp. of milk, cream or softened butter into the dough using your fingers. Work the moistening agent into the dry dough until the dough reaches the desired consistency.
Add cool water, drop by drop, to the dough while working it in with your hands as another option; keep adding water until the dough becomes moist.
Elizabeth Arnold has written for a wide variety of publications and websites. Her experience includes writing travel features for "Recommend" magazine and packaging marketing copy for both Metro-Goldwyn-Mayer and Warner Bros. consumer products. Recently, Arnold was a staff writer for "Special Events" magazine. Arnold studied English at the University of Wisconsin-Milwaukee.