Preheat oven to 160 degrees celsius
Beat butter and sugar until light and fluffy
Mix in the vanilla essence and sifted cocoa. Add the cornflour and cake wheat flour and mix until you form a firm but pliable dough
Divide the dough into 3 pieces. Roll each one into a rectangular shape
Cut them into little rectangular shapes. I cut mine about 1.5cm in width and about 11cm long. It doesn't have to be the size I cut them. More or less is fine
Place the biscuits on a baking sheet and refrigerate for 15 minutes
Bake for 10 minutes or until you can smell them
Allow them to cool completely on a cooling rack. Melt the chocolate at 30 second increments in the microwave. Mix it well and dip each biscuit into the chocolate. If you can, cut the flake in half down the middle, and divide them into three pieces. If they crumble sprinkle the crumbs on top of each biscuit
Store in an airtight container for up to a week