Combine eggs & sugar, mix well.
Add all dry ingredients plus buttermilk, sourdough starter & cooking oil, mix well.
Knead on floured dough board until nice and smooth.
Roll out to about 1/2" thickness and cut with a doughnut cutter.
Let rise on a greased pan for about 35 minutes, then fry in deep hot fat (365 degrees) until they are a golden brown on both sides.
Roll in sugar while still warm.