Chocolate Chip Shortbread Cookies, GF Recipe - (5/5)

Ingredients

• 18 tablespoons (252 g) unsalted butter at cool room temperature, roughly chopped
• 1/2 cup (109 g) packed light brown sugar
• 1/2 cup (100 g) granulated sugar
• 1 teaspoon pure vanilla extract
• 3/4 teaspoon kosher salt
• 2 1/2 cups (350 g) all purpose gluten free flour (I used Better Batter)
• 11/4 teaspoons xanthan gum (omit if your blend already contains it)
• 1/2 cup + 2 tablespoons (90 g) cornstarch
• 6 ounces dark chocolate wafers, chopped
• 1 egg (any size), beaten
• Coarse sugar crystals (about 1/2 cup), for rolling