The Chewy Gluten Free

INGREDIENTS

• 8 ounces unsalted butter
• 1/2-ounce tapioca flour, approximately 2 tablespoons
• 1 1/4 ounces cornstarch, approximately 1/4 cup
• 1 teaspoon kosher salt
• 1 teaspoon xanthan gum
• 1 1/2 teaspoons vanilla extract
• 12 ounces semisweet chocolate chips
• 1 teaspoon baking soda
• 11 ounces brown rice flour, approximately 2 cups
• 1 egg yolk
• 2 tablespoons whole milk
• 1 whole egg
• 2 ounces sugar, approximately 1/4 cup
• 10 ounces light brown sugar, approximately 1 1/4 cups