Put the sweetened condensed milk into a saucepan on medium low heat and simmer without boiling but whisking regularly for 30 minutes or just until milk starts to darken slightly. DO NOT let burn!
For the Macaroons
Whisk together the sweetened condensed milk, egg whites, flour. sugar, butter, vanilla and salt in a medium bowl until well blended.
Add the coconut and pecans and mix well. Chill dough for an hour.
Preheat oven to 350 degrees.
Scoop coconut mixture using 1/4 cup measure; form into balls and put on parchment paper or Silpat.Bake for 20-25 minutes, just until tops are golden brown. Remove from the oven and let cool for 5 minutes.
For the Chocolate Drizzle
Melt the chocolate and butter in a small saucepan over LOW heat; stirring constantly. Keep warm on the lowest heat..
To Finish the Macaroons
Drizzle the macaroons with the caramelized condensed milk; refrigerate for 5 minutes.
Finish by drizzling with the melted chocolate then refrigerate for 5 more minutes.
Devour.
Notes
You may have extra of the caramelized milk; save it for some ice cream!