In the bowl of a stand mixer, cream the butter and sugar at medium speed for 1-2 minutes.
In a separate bowl sift together the flour, baking soda, salt, and cream of tartar.
Add the apple butter, eggs and vanilla to the butter and sugar, and mix to combine.
On slow speed, add the dry ingredients and mix until fully incorporated.
Scoop the dough onto a parchment lined sheet tray for chilling. Cover and chill for 30 minutes.
Preheat the oven to 325℉. Mix cinnamon and sugar together in a bowl. Coat each cookie in the mixture, then place on a parchment-lined baking sheet or silicone mat. Be sure to give the cookies enough space for spreading out. Bake 8-12 minutes, turning half way through.
Chef Tips!
Use very soft butter and do not over-cream. Too much air will give the cookies a cakier texture, versus that classic 'chewy' sugar cookie texture.