Pre-heat the oven to 150C/300FGas2.
In a deep bowl, place all the ingredients, except the lemonade.Mix well until the mixture is smooth.
Add the lemonade and mix again.
Beat until smooth.
Grease a 9in round cake tin, sprinkle with flour, shake and tip out excess.
Put the mixture into the tin and bake in the centre of the oven for 1-3/4 hours.
Leave to cool in the tin.-Turn out, wrap and leave for 10 hours before serving.