Place dry yeast into a large bowl or mixer bowl. Add warm water and some of the sugar. Let bubble. Add remaining ingredients, starting with 5 cups of the flour. Gradually add more flour until dough comes together without being very sticky. Mix until very well combined.
Using a sharp knife, cut the dough into uniform balls. Weigh the pieces on a digital scale so you know they’re exactly the same size (30 grams is a good size for minis; 60 grams for regular). It helps to spray your hands with nonstick cooking spray or wear gloves.
Place each doughnut ball onto its own square of parchment paper (do not use wax paper!). Cover loosely and let rise for 1 ½ hours.
Deep fry donuts with the parchment paper for 3-4 minutes, flipping halfway through. The parchment paper will come off after about 2 minutes, remove with tongs. When donuts are done frying, drain on paper towels and dust with confectioners' sugar (or fill them as you like!)