Pistachio Shortbread Cookies - Your Local Advertiser

Ingredients

• 1 cup superfine brown rice flour
• 1/2 cup plus 2 tbsp. gluten-free oat flour
• 1/2 cup potato starch
• 1/4 cup tapioca starch
• 1 tsp. kosher salt
• 16 tbsp. unsalted butter (softened)
• 3/4 cup confectioners' sugar (sifted)
• 1 vanilla bean (seeds scraped and reserved)
• 1/2 cup unsalted pistachios (finely ground)