Stir together ingredients for the chocolate layers, and spread ½ of the mixture into the bottom of a 9x13 inch pan. Pat it down, and bake at 350 degrees for 6 minutes.
Melt caramels and evaporated milk in the microwave for 3 minutes, stirring halfway.
Sprinkle chocolate chips over the baked bottom layer, then pour melted caramel evenly over the top.
Form the remaining chocolate layer into small patties and place them gently over the top of the caramel layer. Bake fully assembled bars for 15-18 minutes at 350 degrees.