Christmas Chocolate Chip Cookies.

Bahan-bahan (16 porsi)

• 2 1/4 cups all-purpose flour (250g)
• 1 teaspoon baking soda
• 1 1/2 teaspoons cornstarch
• 1/2 teaspoon salt
• 3/4 cup butter (melted, 170g)
• 3/4 light brown sugar (150g)
• 1/2 cup granulated sugar (100g)
• 1 large egg (plus 1 egg yolk)
• 2 teaspoons vanilla extract
• 1/2 semi-sweet chocolate chips (90g)
• 1/2 cup Christmas M&Ms