In a bowl, cream butter and sugar until light and fluffy; blend in egg. Combine flour and baking soda. Add to creamed mixture; mix well. Stir in granola and raisins or chocolate chips if desired. Drop by rounded teaspoonfuls 2 in. apart onto a greased baking sheet.
Bake at 350° for 10-12 minutes or until lightly browned. Cool on baking sheet for 2 minutes; remove to wire rack to cool completely.