The Ami magazine had a recipe this week for sourdough donuts. I don’t think you will feel the sourness if it has a sweet filling.
I recently made sourdough cinnamon buns and it doesn’t taste sour at all. And the recipe called for 400 gram of starter!
My pleasure! Let me know how it works out. I’m on a different doughnut project this year but these have been on the backburner for a while. Iyh next year