1 1/2 c. graham cracker crumbs
1/2 c. Hershey's cocoa, divided
1/4 c. sugar
1/3 c. butter, melted
1 (14 oz.) can sweetened condensed milk
1/4 c. flour
1 egg
1 tsp. vanilla
1/2 tsp. baking powder
3/4 c. chopped nuts
2 c. (12 oz.) pkg. semi-sweet chocolate chips

Combine crumbs, 1/4 cup cocoa, sugar and butter. Press firmly into a 9 x 13 inch pan. Beat condensed milk, flour, remaining 1/4 cup cocoa, egg, vanilla, and baking powder. Stir in nuts. Spread evenly over crust. Top with chocolate chips. Bake 20-25 minutes in a 350 degree oven. Cool and cut.