1. Cream together butter, sugars and vanilla.
2. Add lightly beaten egg gradually, beating well,
after each addition.
3. Mix in sifted flour and salt.
4. Add chocolate chips and chopped walnuts. Mix
5. Shape teaspoonfuls of mixture into small balls,
place on lightly greased oven trays, allow room
6. Bake in moderate oven 10 to 12 minutes.