Preparation Steps

• In a mixing bowl, beat together the softened butter, granulated sugar, and brown sugar until creamy, about 3 minutes.
• Add the egg and vanilla extract; beat until light and fluffy, approximately 3 minutes.
• In a separate bowl, whisk together the flour, baking soda, cream of tartar, and salt.
• Gradually add the dry ingredients to the wet mixture, mixing on low speed until just combined.
• Use a cookie scoop to form approximately 14 mounds of dough, roll into balls, and flatten slightly.
• Combine the 0.25 cup granulated sugar and 2 teaspoons cinnamon in a small bowl.
• Dredge each dough ball through the cinnamon-sugar mixture, coating evenly.
• Place the coated dough balls on a baking sheet lined with parchment or a silicone mat, spacing at least 2 inches apart.
• Bake in a preheated oven at 350°F for about 9 minutes, until edges are set but tops are slightly glossy and soft.
• Allow cookies to cool on the baking sheet for approximately 10 minutes before transferring to a wire rack.