If you are a pecan pie lover, then you are going to flip over this square version that just so happens to be easier to make and extra tasty thanks to a few special ingredients. This recipe has a brown sugar shortbread crust plus a dark chocolate toffee pecan pie filling that is salty and sweet and everything you could want in a dessert. Dark chocolate toffee pecan bars will quickly become your new go-to dessert year after year.