If you prefer both chocolate and vanilla flavors in one cookie, keep the cookies whole, then dip half of each cookie in the icing and let it set up before dipping the other half in chocolate.
Preheat the oven to 350°F (180°C). Line 3 baking sheets with parchment paper.
Arrange the dough rounds on a work surface. Using a chef’s knife, cut each round in half. Use a metal spatula to transfer the cookies to the prepared sheets, spacing them 1 i