• Preheat the oven to 350 degrees F. Grease a 10x15x1" jelly roll pan and/or line with parchment paper (leaving an overhang on each side so that you can easily lift the bars out of the pan.)

For the Chocolate Mixture

• In a medium saucepan, add the chocolate chips, condensed milk, and butter. Stir over low or low-medium heat until smooth. Then, remove from heat. (You could also use a double boiler for this step).

For the Brown Sugar Batter

• In a large mixing bowl, add the melted butter, eggs, brown sugar, and vanilla extract. Stir, until well combined.
• Next, add the flour and salt, stirring just until combined. Then, fold in the chopped pecans.

Filling the Pan and Baking

• Spread half of the brown sugar batter into the pan. Spoon the warm chocolate mixture over the brown sugar batter, spreading to cover.
• Next, drop batter by the spoonful over the chocolate layer. Spread and swirl the batter over the chocolate layer.
• Bake at 350 degrees F for 30-35 minutes and check or doneness. Move the pan to a cooling rack. Allow to cool completely before cutting into bars. Makes 4-5 dozen.