in a large bowl whisk the sugars and butter until creamy
beat in the egg and vanilla extract until fluffy
add salt and flour stir in until mixed well
divide the dough into two halves
add the cocoa. and cinnamon to one half and mix in
roll each half between waxed paper into 9inch squares.
cut both squares into 3 inch strips then cut the strips into. 4 1/2 x3 inch rectangles
place one cream coloured rectangle on plastic wrap or grease proof paper top with chocolate rectangle, repeat layers until dough is used up. Wrap in the plastic wrap and refrigerate for at least two hours
unwrap and cut widthwise into 18 slices about 1/4 inch thick
either roll out slightly to get marble look or leave stripy look cut out the biscuit shape
place on ungreased. baking sheet bake at 375°F for 8-10 minutes, bake until golden let stand for 2 minutes to cool.
