Cream the butter. Add the sugars and the eggs.
Dissolve the soda in the hot water and add to the creamed mixture alternately with the flour and salt. Add the chopped nut meats, chocolate and vanilla and beat well.
Drop by teaspoonsful about 2 inches apart on a greased baking sheet. Flatten the small balls of dough a little with your finger tips.
Bake 10 to 13 minutes in a preheated 375° oven.
Dough may be refrigerated overnight if you wish.