In a medium heavy bottomed saucepan set over medium-high heat, add 1 1/2 sticks or 3/4 cup of butter. Heat until melted, about 2-3 minutes, then whisk constantly until the butter begins to sizzle, then foam. The butter will become golden brown with a nutty aroma. DO NOT LET IT BURN. Remove the heat and add the remaining butter. Stir until the butter has completely melted.
In the bowl of a stand mixer beat the butter, sugars, and and vanilla until combined, about 1 minute. With mixing speed on low, add the egg and mix until combined.
In a medium size mixing bowl whisk together the flour, cream of tartar, baking soda, salt and cinnamon. With mixing speed on low, gradually add the dry ingredients, mixing just until combined. Fold in cinnamon chips, if desired. Cover and chill dough for at least 2 hours before baking.
Using a standard size cookie scoop, form balls, smooth, and then roll into the cinnamon sugar mixture.
Place on a lined baking sheet and bake cookies at 350 degrees for 8-10 minutes, they will look soft, but as long as they are set on the edges they will firm up as they cool. Remove from oven and allow to cool on the sheets for 5 minutes before transferring to a wire rack to cool completely.