1/2 tsp. baking soda
1/2 tsp. salt
3/4 cup packed brown sugar
1/2 (1 stick) cup butter, softened
1 tsp. vanilla extract
1 large egg
2 (12 oz. pkg.) cups Nestle Toll House Semi-Sweet Chocolate Morsels, divided
1/2 cup chopped walnuts
Combine flour, baking soda and salt in small bowl. Beat sugar, butter and vanilla extract in large mixer bowl until creamy. Beat in egg; gradually beat in flour mixture. Stir in 1-1/4 cups morsels and nuts. Spread into prepared baking pan.
Bake for 20-23 minutes. Remove pan to wire rack. Sprinkle with remaining morsels. Let stand for 5 minutes or until morsels are shiny; spread evenly. Cool in pan on wire rack; refrigerate for 5-10 minutes or until chocolate is set. Cut into bars.