In a large mixing bowl, add the flour, shredded coconut, sugar, sea salt, and cold butter. Using a pastry cutter
, cut the butter into the flour mixture until the butter is thoroughly covered in the flour mixture and are about the size of peas. Make a well in the center of the mixture and pour in the milk mixture. Begin gently incorporating the flour mixture into the milk mixture. It will be shaggy and feel dry. You're doing it right. Dump the loose mixture out onto lightly floured work surface. Use a bench scraper
to gently fold and press the dough over and onto itself. It will not be sticking together very much at this point. Fold a few more times, then pat out into a 1/2" round disk. Wrap tightly, pressing the dough further into shape if needed and place in fridge for at least one hour, or overnight.