Preheat the oven to fairly hot 1900C (Gas Mark 5, 375°F).

Beat the butter with a wooden spoon until it is creamy. Mix the sugars together, then gradually add to the butter, beating until the mixture is light and fluffy. Beat in the egg and vanilla.

Sift the flour, salt and soda into a bowl. Stir into the butter mixture until it forms a smooth batter. Stir in the nuts and chocolate chips.

Drop teaspoonfuls of the mixture or to well-greased baking sheets; leaving about 2 1/2 cm (1 in) between each cookie. Put the sheets into the oven and bake for 10 to 15 minutes, or until they are lightly browned. Cool on a wire rack before serving.