If you plan to bake and ship cookies as Christmas gifts, I have two things to tell you: 1) my home address (just kidding, or am I?), and 2) you'll want to bake cookies that can survive the trip. Here are the ideal cookies for mailing.
Cookies with Crunch
Crisp, dense cookies like shortbread, biscotti, and snowballs are sturdy enough to hold up for the long haul.
More shortbread cookie recipes.
More biscotti recipes.
Cookies with a Little Chew
Softer, chewier chocolate chip, snickerdoodle, and ginger cookies ship well, but they tend to dry out if they’re traveling for more than a week. It's worth it to send these the quickest way you can.
More chocolate chip cookies.
Cookies with a Lot of Chew
Coconut macaroons and Italian pignoli cookies not only mail beautifully, but their texture seems to improve after a few days. Dense bar cookies and brownies do well, too, as long as they don't have cream cheese or custard layers. (Sorry, Nanaimo Bars, lemon bars, and cheesecake bars. You're not going anywhere.)
Go on and show off your mad decorating skills, but with these caveats: 1) choose shapes without fragile bits that easily snap off, and 2) decorate with royal icing. (It hardens as it sets, so your gorgeous work doesn't smear.)