Red bean doughnuts(an-doughnut) with roasted miso sugar

These doughnuts were inspired by an-doughnuts(red bean doughnuts) that I found in my local Japanese grocery store. The doughnuts that I purchased were a cake doughnut base with a chunkier red bean paste(called tsubu-an) in the middle, finished with granulated sugar around it. While I liked the concept of it, I felt like there was…