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You can place the balls of dough close together on the baking sheet as long as they don’t come into contact.
Place a thin layer of cornstarch in a shallow bowl. Scoop the dough out with a cookie scoop or tablespoon. Using clean hands, roll the dough into balls that are equivalent in size to a ping-pong ball. Roll the dough in cornstarch and place the dough onto the baking sheet. Cover the baking sheet with plastic wrap and place the baking sheet in the freezer for 30 to 40 minutes.