Sift together the flour, bicarbonate of soda and salt.
Cream the butter and sugars together until fluffy, then fold in the flour mixture.
Add the vanilla and egg and beat until well mixed.
If the mixture seems dry, add a little water.
Fold in the chocolate dots and nuts.
Drop well rounded small spoonsful of the mixture onto greased baking sheets, spacing them to allow for spreading.
Bake in a preheated moderately hot oven, 190°C (375°F), Gas Mark 5, for 10 to 12 minutes or until golden brown.
Cool on a wire rack.