Oatmeal Chocolate Chunk Cookies

Bahan-bahan (24 porsi)

• ½ cup (1 stick) unsalted butter, (at room temperature)
• 1 cup packed light brown sugar
• ¼ cup granulated white sugar
• 1 large egg
• 1 large egg yolk
• 2 teaspoons ground cinnamon
• 1 teaspoon vanilla extract
• ¾ teaspoon baking soda
• ⅛ teaspoon salt
• 1¼ cups all purpose flour
• 1 cup rolled oats
• 3 ounces dark chocolate, (chopped)