Prolific comfort food purveyors Micah Camden and Katie Poppe’s donut shop “for grown-ups” is a true, Portland-style sugar high. The Little Big Burger duo deftly mash up the city’s artisan-ingredient obsession with fried sweets. Two years in, their clever brioche-dough offerings, from herby-tart blueberry bourbon basil to Valrhona chocolate crunch, threaten to dethrone Voodoo Doughnut as the city’s king dough pusher altogether. So far, there’s a spare, light-filled shop downtown. And on Hawthorne. And on North Mississippi. Another is undoubtedly slated to open next door to your house soon.