Preheat the oven to 350°F with racks in the upper and lower thirds. Line 2 baking sheets with parchment paper.
Place the coarse sugar or sprinkles in a shallow bowl.
Using a #16 cookie scoop or an ice cream scoop, portion the dough into mounds of about 2 tablespoons each.
Roll each mound into a smooth ball, then roll in the sugar or sprinkles to coat, letting any excess fall back into the bowl.
Arrange the dough balls on the prepared baking sheets, spacing them about 3 inches apart. Using your hand or the bottom of a flat glass lightly greased or dipped in sugar, flatten each ball to about 1/2-inch thick.
Bake for 12-15 minutes, rotating the pans front to back and top to bottom halfway through, until the edges look dry and set and the centers are still soft and slightly puffed. The cookies should look pale, not deeply browned.
Let the cookies cool on the baking sheet for 5 minutes—they will deflate slightly—then transfer to a wire rack to cool completely, 20-30 minutes.