Preheat oven to 350 F. Line baking sheet with parchment paper or baking mat and set aside.

In a medium size bowl, whisk together the salt, cinnamon, cream of tartar, baking soda, all purpose flour. Set aside.

In a large bowl, add the butter, sugar, eggs, vanilla extract and beat together until light and fluffy.

Gradually add the dry ingredients into the wet ingredients and mix until combined. Add the shredded apples and continue mixing.

Mix the ¼ cup sugar and cinnamon together.

Using a cookie scooper, scoop the cookies onto the cookie sheet and then sprinkle the cinnamon sugar mixture onto the cookie dough.

Bake for 9-12 minutes and then transfer it to the cookie rack to cool completely.