In two separate bowls, place the red and green sugars and 1 teaspoon of cinnamon in each bowl. Stir to mix and set aside.
1 ½ tablespoons red sugar sprinkles, 1½ tablespoons green sugar sprinkles, 2 teaspoons cinnamon, divided
Preheat the oven to 375℉. Line baking sheets with parchment paper or silicone baking mats. Set aside.
In a mixing bowl, combine the sugar and butter until they are smooth and fluffy. Add in the eggs and vanilla. Mix until a smooth consistency.
1½ cups sugar, 1 cup butter, softened, 2 large eggs, 2 teaspoons vanilla
In a separate bowl, combine the flour, salt, baking soda, and cream of tartar.
3½ cups flour, ½ teaspoon salt, ½ teaspoon baking soda, ½ teaspoon cream of tartar
Slowly mix the dry ingredients into the wet ingredients, just until combined. Don't overmix.
Using a size 40 scoop, scoop dough balls and roll them in the colored sugar. Do half of the balls in the red sugar and half in the green. Place on a prepared baking sheet 2" apart.
Bake for 8 to 10 minutes until the sides of the cookies just begin to brown.
Remove from the oven and cool on the pan for 5 minutes before removing them to a cooling rack to cool completely.