2. In a bowl, combine the pretzel crumbs, butter, and vanilla. Press the mix into the prepared baking dish. Gently pour the condensed milk over the pretzels in an even layer. Sprinkle the coconut flakes evenly over the condensed milk, then add 2 cups chocolate chips in an even layer and then layer on the nuts. Sprinkle over the remaining 1/2 cup chocolate chips. Add a handful of pretzels, if desired. Press down with a fork to help submerge everything.