Heck, I worked as a doughnut maker for a while, was nothing like that.
11 PM- 6AM more or less, solo shift, I think it paid $4 bucks an hour, early 80's, mid winter.
Cake donuts batter made out of one 50# sack, mix, & add a few ingredients, & fry with a dough dispenser over the fyolater, made O shapes as they dropped into the hot fat. Cook, flip, take out & drain extra grease.
Next came the bread doughnuts, they came from a 50# sack mix too, added yeast, proofed, roll out & cut O shapes, let proof again. Fry in fryolater, flip, you'll know when after a couple batches.
Left over bread doughnut dough was made into big cinnamon snails or crullers. Had to make some fancies and filled ones too. Mostly adding sugar, or chocolate flavored sugar, glaze etc. One thing about filled doughnuts one should know; the filling is often cheap & gross and comes out of a 5 gallon plastic pale(infn your lucky) ;}
I remember I was working one of these shifts when John Lenon was shot, to give a time frame. The cool jazz station I usually listened to went to his songs. That was at the black dog bakery, anyway, the septic in parking lot went up & down with the tide ([probably still does).