Step 1: 1 cup butter, 2 cups flour, 1/2 cup sugar. You must use butter, no margarine. Cut these 3 ingredients into crumbs and press into a greased 9x13 pan. Bake at 375 for 20 minutes.
Step 2: 1 cup butter, 1 cup brown sugar, 4 T. corn syrup, 2 can sweetened condensed milk.Put in sauce pan and bring to boil on medium heat stirring continously with a whisk. Be carefull this can scorch very easily. Don't worry to much about a few brown specks. Boil exactly 5 minutes. Wait 5 minutes and pour over cookie crust.
Step 3: Melt 1 cup of milk chocolate chip or semi sweet chocolate chips with 1 T. oil. drizzle a few layers of chocolate over top and spread very gently. Refrigerate several hours before serving.
Sit, relax and enjoy. And don't worry about calories!!