Preheat oven to 350 degrees. Cream butter and sugar until light and fluffy. Add egg, vanilla, salt, flour and mix well. Lightly spray pan with cooking spray. Butter your fingers and spread dough evenly in pan. Bake in oven for 15 minutes or until lightly browned. Sprinkle chips over hot baked dough and spread chocolate when it is melted. Sprinkle chopped nuts over the top.
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