These are really chocolate Swiss rolls and taste much better than tree trunks! Step-by-step photo instruction can be found on the Class1 Tivetshall Blog, so go and have a look at what you made and show your mums and dads.
4 ounces sugar
4 ounces self raising flour
1 ounce of cocoa powder
You will also need:
A little margarine for greasing the tin
Some grease proof paper for lining the tin
A Swiss roll tin or a large shallow tin (about 30x20cm)