Instructions

Add eggs, one at a time, mixing well between each addition.

Mix in the cake flour until well combined.

Set aside half of the mixture, then mix cocoa into the other half.

Spoon dollops of cookie dough onto a sheet of cling wrap, then roll to encase the dough and form a log (I use 1/3 of each mixture to make three smaller logs rather than one large one). Make sure each log is tightly wrapped with cling film then refrigerate for an hour or until set (you can also freeze them at this stage).

Preheat oven to 180c then line a baking sheet with baking paper.

Slice the set cookies (I slice mine about 5mm thick) then lay onto lined baking tray, leaving some space in between.

Bake for 12-15 minutes until the vanilla cookie side is lightly golden and cookies are set.

Cool on a wire rack.

Store in an airtight container.