Beat butter at medium speed of an electric mixer until creamy. Gradually add sugars, beating well. Add eggs and vanilla, beating well.
Combine flour and next 3 ingredients, stirring well. Add to butter mixture, beating at low speed just until blended. Stir in candy bars, chocolate, and nuts. Drop dough by heaping tablespoonfuls 1 1/2 inches apart onto ungreased cookie sheets.
Bake at 350° for 10 minutes or until lightly browned. Let cool slightly on cookie sheets; remove to wire racks and let cool completely.