I bought wholesale bakery cupcake boxes online: http://www.boxandwrap.com/pastrybox.html
I bought about 500 munchkins from Dunkin Donuts in 6 different flavors to randomized each box. Put 4 in each one and wrap them in colored tissue paper. Top off with a ribbon that matches your theme or in my case my bridesmaids dresses!
for a little extra flair: tie a little note to each one that says "Thank You" and add a sweet little message for your guests.
It's a unique sweet treat to thank your guests, and honestly everyone loves doughnuts and they can enjoy it the next morning while they are waking up from a crazy night!