This year, though, we've learned a few tricks from recent cookbooks that are just as easy and give cookies a flavor boost. And these holiday baking techniques extend beyond just the decoration, because sometimes it's what's inside the cookie that makes all the difference. Just know this: you're going to want to start one of them at least 2 weeks in advance, so....better get baking! Age the DoughPhoto by Joseph De Leo, Food Styling by Samantha Seneviratne and Jason SchreiberAging cookie dough is not a new technique. Some recipes are aged, before baking, for up to 4 weeks (and some are aged even further after baking).