The secret to making Starbucks' iconic snowman cookies lies in the dough. You'll need to mix together flour, sugar, butter, and vanilla extract until it forms a smooth dough. Then, roll the dough out to about 1/8 inch thick and cut out circles using a circular cookie cutter. Once they've baked, it's time to assemble the cookies. Start by stacking the cookies, adding a layer of icing in between each one. Then, use a piping bag to create a snowman shape on top of the stack. Finally, add a few details like eyes and a carrot nose with icing and enjoy!