Preheat oven to 160C/325F/Gas 3
Either grease a 20cm round tin and line with baking paper, or grease and line 4 mini loaf pans as I did.
Throw all ingredients into a large bowl and stir them all together until they are thoroughly mixed.
Spoon the mixture into your prepared tin/s and smooth out the top.
Bake a single cake for approx 1 1/2 hours and smaller cakes for just over 1 hour. Test by inserting a skewer into the centre. It should come out clean and the cake/s should have shrunk away from edges of tin/s just a little.
Leave to cool before removing for tin/s and then ice as you wish.