In large bowl, cream butter, shortening and sugars Beat in egg and vanilla.

Combine flour, baking soda and salt; stir into butter mixture, mixing well.

Stir in chocolate chips and nuts.

Drop by teaspoonfuls, 5 cm apart, onto greased baking sheets.

Bake in 180ºC oven 8-10 minutes, just until edgesare golden (centers will still be soft).

Remove to wire racks to cool.