These chewy snickerdoodle cookie bars are sweet, chewy, and coated in cinnamon and sugar with a touch of salt on top. They're a quick, easy to make bar that everyone loves!
Preheat oven to 350 F. Spray and line an 8" baking pan with parchment paper.
Place the butter and sugar in a stand mixer fitted with a paddle attachment. Beat on medium-high speed until light and fluffy, about 3 minutes.
Add egg, vanilla and milk and mix on low until smooth, about 30 seconds.
Slowly mix in flour, cream of tartar, soda, cinnamon and salt, being careful not to over mix. I usually stop when I still have some flour remnants around the bowl.
Mix together the sugar and cinnamon in a small bowl. Sprinkle half the mixture into the bottom of the pan on top of the parchment paper. Place cookie dough into pan and smooth out as best you can. The dough is sticky and it won't be perfect, but don't worry. It all works out when it bakes. Sprinkle the remaining cinnamon and sugar along the top.
Bake the bars for 17-20 minutes. You're looking for a nice light golden brown around the edges, but be careful not to over bake, or you will lose the chewy factor we are going for. Sprinkle with flaked salt after you've removed it from the oven if desired. Allow to cool before cutting.
Notes
This can also be baked in a round cake pan and served like a cookie cake.I have given both cups and grams as measurements. Grams will be more precise, especially when measuring flour. If you don’t have a kitchen scale, no problem! Just lightly spoon flour into your measuring cup to insure its not packed in there. Light and fluffy is the key.