1. Preheat oven to 350 degrees. Spray a 9 x 13 pan with non-stick cooking spray and line with parchment paper.

2. In a microwave safe bowl, microwave 2 Tablespoons butter, chocolate chips and sweetened condensed milk in 15-30 second intervals, stirring in between until smooth. Set aside to cool slightly.

3. Meanwhile, in a large saucepan over medium heat melt 1 cup of butter. Once melted, add brown sugar and stir until fully dissolved. Remove from heat.

4. Add flour, salt, vanilla, eggs, nuts and coconut to brown sugar butter mixture. Stir until combined well.

5. Spread half of the mixture into the bottom of the 9 x 13 pan. Spoon melted chocolate over the dough, leaving some bits of dough uncovered.

6. Scoop remaining spoonfuls of dough on top of chocolate mixture, leaving some bits of chocolate uncovered. Bake for 30-35 minutes or until golden brown on top and set in the center.

7. Cool for an hour before removing bars from pan. Slice into squares. Dust with confectioners sugar if desired.