Preheat oven to 325℉ and line 2 baking sheets with parchment paper.
In a food processor, crush the pistachios until you have crumbs (don't process too long where they turn into a powder or a butter).
In a bowl, mix the egg, egg white, vanilla, and sugar until well combined. Mix in the arrowroot flour. Fold in the pistachios and shredded coconut.
Scoop the mixture into balls about 1 ½ tablespoon in size and place on prepared baking sheets. Bake for about 25-27 minutes, or until lightly golden.
Melt the chocolate chips and drizzle over top of the cookies. Enjoy!