line 2 13-inch by 9-inch, baking pan with foil and grease the foil; set aside. in a large bowl, combine the pretzels, corn chips and pecans.
in a medium sauce pan melt butter. Stir in brown sugar until melted. bring to a boil, stirring frequently.boil for 1 minute, stirring twice. pour over pretzel mixture; toss and coat . transfer to baking pans evenly.
Bake at preheated oven 350 degrees f, for 7 minutes. sprinkle with chocolate chips. bake 2 minutes longer until chips are softened. spread over top. cool on a wire rack for a hour or until firm. break into pieces. serve, store in a airtight container.