The Chewy Gluten Free Chocolate Chip Cookie Recipe | Alton Brown

Ingredients

• 16 tablespoons (2 sticks) unsalted butter
• 2 cups brown rice flour
• 1/4 cup cornstarch
• 2 tablespoons tapioca flour
• 1 teaspoon xanthan gum
• 1 teaspoon kosher salt
• 1 teaspoon baking soda
• 1 1/4 cups light brown sugar
• 1/4 cup granulated sugar
• 1 large egg plus 1 large yolk
• 2 tablespoons whole milk
• 1 1/2 teaspoons vanilla extract
• 1 (12-ounce) bag semisweet chocolate chips