The cinnamon bun is a thing of beauty. Goopy twirls of cinnamon-sugar swirled between sweet, flaky dough and topped with icing dripping down the sides...it's a match made in heaven. But Instagram foodies have cracked the code to making cinnamon buns even better, if you can believe it. From flavors like s'mores, funfetti and even bourbon, it's time to extend your expectations for this oh-so decadent of treats.