Heat oven to 350°F. Remove wrappers from candies. Cut each candy into 1/2" pieces; set aside.
Stir together flour, baking soda and salt. Beat butter, granulated sugar, brown sugar and vanilla in large bowl with mixer until creamy. Add eggs; beat well. Gradually add flour mixture, beating well. Stir in candy pieces and nuts, if desired. Drop by rounded teaspoons onto ungreased cookie sheet.
Bake for 9 to 11 minutes or until lightly browned. Cool slightly; remove from cookie sheet to wire rack. Cool completely.