1. Heat oven to 350°F.
2. Beat butter and shortening in large bowl until well blended. Add brown sugar and granulated sugar; beat thoroughly. Add egg and vanilla, beating until well blended. Stir together flour, baking soda and salt; gradually beat into butter mixture. Stir in chocolate chips and nuts, if desired. Drop by rounded teaspoons onto ungreased cookie sheet.
3. Bake 9 to 11 minutes or until edges are lightly browned. Cool 2 to 3 minutes; remove from cookie sheet to wire rack. Cool completely. Makes about 42 cookies.