Morning buns aren’t a big thing on the East Coast—at least not that we’re aware of. We discovered them on a trip to San Francisco, where it seems several well-known bakeries make them every morning. What’s the difference between a morning bun and a cinnamon roll? Well, we’ll tell you…Morning buns are made with croissant dough that’s light, flaky, and extremely buttery, rather than a chewier, more bread-like dough.