1/3 c. butter, melted
1 c. firmly packed brown sugar
1/2 tsp. vanilla
1 egg
1 1/3 c. flour
1 1/4 tsp. baking powder
1/2 tsp. salt
1/4 c. chopped walnuts
3/4 c. chocolate chips, divided

In mixing bowl, blend butter, brown sugar and vanilla. Stir in egg. Combine flour, baking powder and salt. Add to butter mixture; blend well. Stir in nuts. Cover the bottom of an 8 inch square glass dish with waxed paper. Press half the dough evenly in the bottom of the dish. Sprinkle 1/4 cup of the chocolate chips on top and press into dough.

Press remaining dough on top of chocolate chips. Cook 3 1/2 to 4 1/2 minutes in microwave rotating dish 1/4 turn halfway through cooking time. Rest 5 minutes. Turn out of dish, remove waxed paper and turn right side up. Heat remaining chocolate chips in a glass custard cup 1-1 1/2 minutes or until soft enough to spread.