The Best Snickerdoodles I Have Ever Eaten

In a large bowl, cream butter and sugars at high speed.
Add egg, vanilla, and beat until smooth.
In another bowl, combine flour, salt, baking soda, and cream of tartar.
Pour dry ingredients into the wet ingredients, mix well.
Preheat oven to 300° while you let dough rest 30-60 minutes in fridge.
In a small bowl combine topping.
Take about 2 1/2 tablespoons of dough and roll it into a ball.
Roll this dough in the cinnamon/sugar mixture and press onto greased cookie sheet.
Bake cookies 10-12 minutes, NO MORE.
*Cookies may seem undercooked but will develop.
Don't roll your dough into too big of a ball; they may not turn out in that much time if you do that.
It happened to me.
lol.
If the cookies don't turn out, please try again.
It's a very good cookie, it's just all a matter of getting the cooking time right.