Preheat oven to 350 degrees Fahrenheit.
In a large mixing bowl or stand mixer- cream the butter, brown sugar, and granulated sugar together until light and fluffy, about 5 minutes. Add the egg, maple extract, and maple syrup until everything is well incorporated.
Whisk flour, cream of tartar, baking soda, cornstarch, ground cinnamon, and salt in a medium bowl. Add the dry ingredients to the butter/sugar mixture and stir until just combined.
Cover and chill the dough for at least 1 hour or up to 24 hours in the refrigerator.
In a small bowl, mix white granulated sugar and ground cinnamon and set aside.
Scoop the dough and roll it into 1 1/2-inch size balls (around 1.5 ounces). Then roll into the cinnamon/sugar mixture. Place on a cookie sheet 2 inches apart.
Bake for 11-13 minutes or until the edges are starting to turn golden brown and the centers are just set.
Allow the cookies to remain on the cookie sheet for at least 10 minutes before transferring to a cooling rack to finish cooling. Enjoy!