Preheat your oven to 325 F Line 2 baking trays with parchment paper.
Sift the icing sugar and ground cinnamon into a medium bowl. Set aside.
In a bowl of your stand mixer with a dough hook, beat the butter with sugar until light and fluffy. Add the vanilla extract. Sift the all-purpose flour and corn flour together over the butter mixture and continue beating until it comes together.
Roll heaped tablespoons of mixture into balls, then roll in the cinnamon-sugar mixture and place on the prepared baking trays.
Bake in the preheated oven for 14-15 minutes or until pale golden.
Remove from the oven and allow to cool for 5 minutes.
Toss the cookies again in the sugar mixture and leave on a wire rack to cool completely.
ENJOY!