Step 1

Preheat the oven to 180C/350F/Gas 4, and line a baking tray with parchment paper, or a silicone mat. Set aside.

Step 2

Whisk together the flour, cocoa powder, baking powder, baking soda, cornflour, salt, and spices. Set aside.

Step 3

Whisk together the butter and sugars until combined. Add the egg and vanilla, and mix until combined.

Step 4

Add the dry ingredients, and mix until just combined. Fold in the chocolate chips.

Step 5

In a small bowl, mix together the sugar and cinnamon.

Step 6

Roll the dough into 1.5oz balls, roll them in the sugar mixture until evenly coated, then place onto the prepared baking tray.

Step 7

Bake for 10 - 12 minutes or until firm and cracked on top. Allow to cool on the baking tray for 5 - 10 minutes before transferring to a wire rack to cool completely.