Preheat oven to 350 degrees and line a cookie sheet with parchment paper
In a large bowl, mix together flour, cream of tartar, baking soda, and salt together. Set aside.
Using a standing mixer cream together the sugar and butter.
Beat in the eggs and vanilla and mix well.
Add dry ingredients to wet ingredients and mix well
Mix in 1/2 C crushed cinnamon oreos and 1/2 C white chocolate chips and mix into the dough
Using a ice cream scooper, scoop dough onto the cookie sheet
Bake for 8-10 minutes
Allow to cool for a few minutes
Remove foil from frosting container and place into the microwave for 45 second
Mix until smooth
Place injector into frosting and pull some frosting up
Pierce the side of the cookie with the needle and inject the frosting into the cookie