1In large bowl, beat sugar, butter, vanilla and egg with electric mixer on medium speed until light and fluffy. On low speed, beat in flour, cocoa, baking powder and salt until blended. Turn dough onto lightly floured surface; shape into 6x2 1/2-inch roll. Cover; refrigerate until firm, about 1 hour.
2Heat oven to 350°F. Spray cookie sheet with cooking spray. Cut dough into 1/4-inch slices. On cookie sheet, place cookies about 1 inch apart. Carefully insert lollipop stick into bottom of each cookie.
3Bake 12 to 15 minutes or until set. Cool 10 minutes; remove from cookie sheet to cooling rack. Cool completely, about 30 minutes.
4Using chocolate topping, attach peppermint patty pieces for ears, candy corn for eyes, chocolate candies for nose and licorice pieces for whiskers on each cookie.