Pastelitos de boda (literally, "wedding cookies") are a traditional dessert at Mexican weddings. Made with walnuts, pecans, or almonds, they're a sweet way to thank guests for sharing the day. To give as favors, tuck two into a tiny clear box along with a note imprinted with a fitting sentiment or your wedding date. Type on a computer, print on colored vellum, then cut the messages into tiny strips.