Sprinkle about half of the remaining powdered sugar into the skillet.
Divide the dough into 20 half-ounce portions (I use a #60 scoop).
Tumble each piece in the powdered sugar until fully coated and roll into a ball.
When all of the pieces have been rounded up, shake the skillet so the cookie dough rolls around, collecting more sugar.
Arrange the cookies on a parchment-lined half sheet pan and bake until puffed and firm, about 18 minutes.
Cool to room temperature directly on the sheet pan and sift the remaining powdered sugar on top.