1. Preheat oven to 350 F
2. In a medium bowl, using an electric mixer cream together butter, confectioners' sugar, and vanilla until smooth.
3. Stir in flour & cornstarch.
4. Pop dough into cookie gun and press onto an ungreased baking sheet.
5. Bake for 8 to 10 minutes in the preheated oven, or until the peaks are golden.
