1/2 c. butter
1 (12 oz.) pkg. Hershey's semi sweet chocolate chips
1 1/2 c. sugar
1 1/4 c. all purpose flour
1 tsp. vanilla
1/2 tsp. baking powder
1/2 tsp. salt
3 eggs
1 c. coarsely chopped walnuts

Heat oven to 350 degrees. Grease rectangular pan, 13"x9"x2" with Crisco.

Heat butter and 1 cup chocolate chips in 3 quart saucepan over low heat, stirring constantly until melted. Stir in sugar, flour, vanilla, baking powder, salt and eggs until smooth. Stir in remaining chocolate chips. Spread in pan, sprinkle with walnuts. Bake until center is set, about 30 minutes. Cool completely. Cut into bars.