Cookies and Cream Biscuits

preheat oven to 180*c 
gather the ingredients 
BISCUIT
125g butter 
1/2cup soft brown sugar 
1/2 cup white sugar 
1 egg 
1 1/4 self raising flour sifted 
2 tbsp baking coca 
drop vanilla essence 
ICING 
1 cup icing sugar 
tbsp soft butter 
tsp boiling water 
drop vanilla essence

add butter and both brown and white sugar into a large mixing bowl use a electric beater to cream the butter and sugar, beat in egg, sift in flour and baking cocoa, roll out the mixture to about 1cm, cut using a biscuit cutter, place on a greased tray, put in oven and bake for 15-20 minutes, cool on a wire rack, once cool make icing, cream 1 tbsp butter, add 1 cup of icing sugar, add tsp of boiling water and drop of vanilla, mix till soft and creamy, put icing on a biscuit, then a biscuit on top.