Preheat the oven to 400° F and line two baking sheets with parchment paper or silicone mats. Set aside.
In a shallow bowl, mix together the cinnamon and sugar coating ingredients and set aside.
To a large mixing bowl, using a hand mixer (or the bowl of a stand mixer fitted with the paddle attachment), cream together the sugar and butter until light and fluffy.
Add in the vanilla extract and eggs, mixing well.
Use a spatula to stir in the flour, cream of tartar, baking soda, and salt until fully combined.
Stir in the toffee bits until evenly distributed.
Use a medium cookie scoop to portion the dough into approximately 1" balls. Roll the ball between your palms to smooth them, and then roll in the prepared cinnamon and sugar coating. Place on the pan.
Bake for 8-10 minutes or until edges are just golden. Remove from the oven and let rest on the pan for up to 5 minutes before moving to a wire rack to cool.
