Please read About Doughnuts.
Whisk together in a medium bowl:
Beat in a large bowl until foamy:
Gradually add and beat until thoroughly blended:
Stir in until blended:
Add the flour mixture to the egg mixture and stir just until incorporated. The dough will be very soft. Pat the dough into a disc, wrap in plastic wrap, and refrigerate for at least 2 hours and up to 2 days.
Roll out, cut, rest, and fry as for Cake Doughnuts. Drain well on paper towels and either dust with:
or toss in a bowl with:
Serve while still warm.