Cut cookie dough into 1/4-in. slices. Place 2 in. apart on ungreased baking sheets. Bake at 350° for 8-12 minutes or until edges are lightly browned. Cool for 2 minutes before removing to wire racks to cool completely.
For frosting, in a small bowl, cream shortening and butter. Gradually beat in confectioners' sugar. Beat in milk and vanilla until smooth. Spread over cookies. Decorate with chocolate chips, candy corn and Red Hots. Yield: 2 dozen.