1/2 butter, softened
1 c. light brown sugar, firmly packed
2 c. flour
1 c. broken pecan pieces
2/3 c. butter, softened
1/2 c. light brown sugar, firmly packed
1 (6 oz.) pkg. milk chocolate chips

Preheat oven to 350 degrees. Mix 1/2 cup butter, 1 cup brown sugar and flour until the texture of fine crumbs. Press mixture firmly into ungreased 9 x 9 inch pan. Sprinkle pecan pieces over top and set aside. Meanwhile, mix 2/3 cup butter and 1/2 cup brown sugar in small heavy saucepan. Stir until mixture comes to a boil; boil and stir 1 minute. Pour over pecans. Bake 18 to 20 minutes until set. Remove from oven. Sprinkle with chocolate chips. Cool in pan and cut into bars.