-
Mix butter, brown sugar and flour until mixture resembles fine crumbs. Press mixture firmly into ungreased 9 x 13-inch pan.
-
Sprinkle pecan pieces over crumb mixture.
-
Combine 2/3 C butter and brown sugar in small heavy saucepan, until mixture comes to a boil. Boil and stir 1 minute. Turn off heat and let mixture stop boiling over the heat.
-
Pour mixture over pecans.
-
Bake 18-20 minutes until set.
-
Remove from oven and sprinkle with chocolate chips. When chips have melted, spread evenly over bars.
-
Cool in pan before cutting into bars.