Cream the butter in a large bowl. Add the sugar and mix until combined.
Add the eggs and vanilla and mix until combined.
In a separate bowl, combine the flour, cream of tartar, baking soda, baking powder, and salt.
Gradually add flour mixture to creamed mixture, stirring until well combined.
Stir in white chocolate chips.
Refrigerate dough for 30 minutes.
Preheat oven to 375 degrees.
Combine sugar and cinnamon in a small bowl.
Remove dough and form into small balls.
Roll balls in sugar and cinnamon and place on a parchment-lined cookie sheet.
Bake for 8 to 10 minutes.
Remove and let cool on sheet for two minutes before transferring to a cooling rack.