Happy Donuts, 3801 24th St. (Noe Valley)Happy Donuts is also one of the few (only?) places in Noe that's open 24 hours.
Appearance: Big and puffy, with a crackly glaze.
Sweetness level: Pretty darn sweet, but not achingly so.
Melt-in-mouth factor: Excellent. It’s light, airy, and super fresh.
[Refreshingly Unhip: The Best Glazed Doughnuts in SF]