• Preheat the oven to 350 degrees F.

For the Cookie Dough:

• For the Butter and Sugar Mixture - In a large mixing bowl, add butter, sugar and eggs.  Beat with a mixer until creamy.  Set aside for a moment.
• For the Dry Ingredients - In a medium size bowl, add flour, cream of tartar, baking soda and salt.  Stir together.
• To the butter and sugar mixture, slowly add the dry ingredients a little at a time while beating with a mixer on the lowest speed. 
• For the Cookie Dough - Roll the dough into balls (a size that is a bit larger than a quarter) and set aside on a plate.

For the Sugar and Cinnamon Mixture:

• In a small bowl, add sugar and cinnamon.  Mix together.   
• Roll each cookie dough ball in the sugar and cinnamon mixture to coat all sides.
• Place the dough balls on an ungreased cookie sheet leaving an even amount of empty space in between each one (the cookies will need to be baked in batches).
• Bake in a preheated oven (at 350 degrees F.) until the bottoms of the cookies turn a golden color (about 15 minutes) or darker if preferred.
• Let the cookies cool on a rack before serving.