For the Doughnuts: 2/3 cup (160 ml) whole milk 3 whole eggs plus 1 egg yolk 3 1/3 cups bread flour (1 pound; 453 g) 1/4 cup granulated sugar (1 3/4 ounces; 50 g), plus 1/2 cup more for rolling 2 teaspoons Diamond Crystal kosher salt; for table salt, use half as much by volume 2 1/4 teaspoons yeast (1 packet; 7 g) 6 tablespoons (84 g) unsalted butter 2 to 3 quarts neutral oil (2-3 L), such as canola, peanut, or vegetable oil for frying For the Vanilla Crème Légère: Scant 1/2
