Mars world

1. 1.Melt the chocolate in a heatproof bowl, set over a pan of simmering water. This can be left to melt as you do the next step.

2. 2. Melt the butter in a pan over medium heat; once the butter has started to melt add the chopped mars bars. Stir constantly as some parts of the mars take longer to melt than others.

3. 3. Add the cereal, saving about a third to add in last. Mix well making sure all the cereal is covered; mix in last of the cereal. Spread evenly in a Swiss roll tin. Cover with chocolate and leave to set.

4. 4. Cut into squares or fingers.