COMBINE flour, salt and baking soda in medium bowl; stir.
BEAT butter, brown sugar and granulated sugar in large mixer bowl until creamy. Beat in egg and vanilla extract. Gradually beat in flour mixture. Stir in morsels and nuts. Press into cast iron skillet.
BAKE for 15 to 18 minutes or until golden brown throughout. Cool for 10 minutes; serve topped with ice cream. Sprinkle with berries; drizzle with Nesquik.