Preheat oven to 350°F (175°C). Line a baking sheet with parchment paper.
In a large mixing bowl, cream together the butter and 1.5 cups of sugar until light and fluffy.
Beat in the maple extract and eggs until well combined.
In a separate bowl, whisk together the flour, cream of tartar, baking soda, and salt.
Gradually add the dry ingredients to the wet ingredients, mixing until just combined. Stir in the chopped pecans.
In a small bowl, mix together 0.25 cup of sugar and 1 tablespoon of ground cinnamon.
Roll the dough into 1.5-inch balls and then roll each ball in the cinnamon sugar mixture to coat.
Place the coated dough balls onto the prepared baking sheet, spacing them about 2 inches apart.
Bake for 10 minutes, or until the edges are lightly golden. Allow cookies to cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.