White Chocolate Fudge with Pecans and Caramel

This is a family favorite around this time of year.  And the best part is that it makes a lot, so we even get to share with others. :)  It truly is a delight!  Enjoy!
-4 Tbs (1/2 stick) unsalted butter, cut into small pieces
-1 (24 oz) bag white chocolate chips
-1 (14 oz) can sweetened condensed milk
-1 tsp vanilla extract
-1 cup pecan chips
-1/2 cup caramel sauce
Line a 9x13 inch pan with parchment paper.  Set aside.
In a medium saucepan, melt the butter, chocolate and milk.  Make sure to stir constantly.  Once melted, add the vanilla and give it a good stir. Remove from the stove and add the pecan chips.  Mix well and pour into prepared pan.  Spread it evenly with a spatula.  
Drizzle the caramel sauce and swirl it in with the spatula.  Place in the fridge for 4-5 hours.
Once set and ready to enjoy, remove from fridge and gently separate it from the parchment paper onto a cutting board.  Cut into pieces and enjoy.  Immediately refrigerate leftovers. YUM!