Chan,

I found this recipe on the internet.

Chocolate Concrete

4 oz. butter or margarine
1 tablespoon sugar
2 tablespoons drinking chocolate
1 tablespoon golden syrup
2 tablespoons raisins
8 oz. Rich Tea or Plain Biscuits
5 oz. Bournville or good quality milk chocolate

Melt the butter and sugar with the syrup in a large pan. Add the raisins and drinking chocolate and bring to a boil. Allow to bubble gently for two to three minutes to thicken a little.

Meanwhile, crush the biscuits with a rolling pin. Alternatively, you can grind them in a food processor to give crumbs, depending on whether you prefer a smooth or chunky effect. Don't leave the biscuit pieces too large, however, or the finished slab will tend to break up when cut. Mix the crumbs well into the melted mixture, coating thoroughly.

Press into a lined 7 in. by 11 in. shallow Swiss roll tin and level out, pushing down the mixture well. Melt the chocolate carefully and spread over the top. Leave to set in a cool place then cut into 15 or 24 pieces with a sharp knife.

(Other curious names for this recipe include rocky road squares, chocolate concrete or the rather dubious sounding cement!).

Sure sounds interesting!