In a large mixing bowl, add 1 cup softened unsalted butter and 4 oz softened cream cheese and beat until creamy and combined. Add 1¾ cup granulated sugar and beat until light and creamy and well-combined.
Add 2 large eggs and 1 teaspoon vanilla extract. Stir well.
In a separate bowl, stir together 3¼ cups all-purpose flour, 1 teaspoon cornstarch, 1½ teaspoon cream of tartar, 1/2 teaspoon baking soda, ¾ teaspoon salt, and ½ teaspoon ground cinnamon.
Gradually add flour mixture to butter mixture until completely combined. Cover bowl with plastic wrap and transfer to refrigerator to chill for at least 30 minutes.
Once dough has nearly finished chilling, preheat your oven to 350 degrees Fahrenheit and line a baking sheet with parchment paper. Prepare your topping by stirring together ⅓ cup granulated sugar and 1 tablespoon ground cinnamon until well-mixed.
Remove chilled dough from refrigerator and scoop by 1 ½ Tablespoon-sized portions. Roll into a smooth ball between your palms and roll through cinnamon/sugar topping mixture until completely coated.
Place on prepared cookie sheet at least 2” apart and bake for 10-13 minutes.