Preheat an oven to 180 celsius / 355 fahrenheit / gas mark 4.
In a large bowl, add in the sugars, spices, salt and clementine zest and rub together with the pads of your fingers.
Then, add in the melted butter and mix well.
Next, crack in the eggs and combine.
Now, fold in the dry ingredients and stir until fully combined.
Evenly spread the sugar cookie dough into a lined 9x9 inch square baking pan.
Bake for 22 - 25 minutes or until the chai cookie bars are golden brown and a toothpick inserted comes out clean. Allow to fully cool on a wire rack.
Now for the frosting. In a large bowl whip together the cream cheese and butter until light and fluffy.
Then, add in the maple and vanilla and mix well.
Finally, add in the icing sugar in three parts, whipping the frosting each time, until you have a light, fluffy frosting that isn’t too thick.
To make the cinnamon sugar, simply mix the cinnamon and sugar together in a small bowl.
Top the chai sugar cookie bars with the maple frosting and a sprinkling of cinnamon sugar and cut into 9 large bars or 16 small ones, serve and enjoy!