Preheat the oven at 180 degrees Celsius.
Mix the flour, baking powder and salt in a bowl and set aside.
In a bowl of an electric mixer, beat the butter and sugar till pale and fluffy.
And in the egg and vanilla extract and incorporate.
Add the flour mixture to the butter mixture a little at a time, until just combined.
In a small bowl or plate, mix in the remaining sugar and cinnamon powder and then make palm-sized cookie dough balls and roll into the mixture. Coat the balls evenly.
-
Place the cookie dough balls 3-inches apart on a parchment lined baking tray, and press down gently.
Bake for 10-12 minutes until golden brown, then remove from the oven and allow them to cool and set on a wire rack.