In a small mix together cinnamon and sugar. Set aside. Optional step, split the mixture in half into two bowls, if you want to toss the cooled cookies after baking. Note: If you are not wanted to toss the cookies with extra cinnamon sugar after baking. You can half the cinnamon sugar recipe. In a mixing bowl or onto parchment paper, sift flour, cream of tartar, and baking soda.
In the bowl of a stand mixer (or use a hand mixer), add butter and sugars. Mix until light and fluffy, about 4-5 minutes. Scrapes sides of mixing bowl, when needed.
Add eggs and vanilla extract. Mix for about 2-3 minutes until light and smooth.
With a rubber spatula fold in flour mixture in three parts. Fold until just combined, try not to over mix the dough.
With a cookie scoop portion the cookie dough and toss in the reserved cinnamon sugar. Place on a sheet pan lined with parchment paper.
Note: This cookie dough can be baked right away, no chilling required. But I do recommend chilling or freezing the dough for a minimum of 2 hours.
Small cookie scoop about 1 ½ tablespoon or medium cookie scoop about ¼ cup.
Preheat oven to 350F and line sheet pans with parchment paper.
Placed the cookie dough portions on sheet pans with at least 2-3 inches of space between the cookie dough.
Bake time : small cookies approx. 7-8 minutes or medium cookies 10-11 minutes. Try not to over bake the cookies. They should be puffed but soft in the middle.
Leave the cookies to cool for 5 minutes on the hot sheet pan, the cookies will continue to cook.
Optional Step: When the cookies have cooled on the sheet pan, toss them in the reserved cinnamon sugar. Then transfer to a cooling rack to fully cool. Enjoy.