Grease a deep 18cm/7" spring-form or loose-bottomed round cake tin and line base & sides with baking parchment
In a large mixing bowl, cream the butter and sugar until pale and fluffy
Pour the eggs over the mixture, a little at a time, beating well after each addition. Add a tablespoonful of the flour between each addition to help prevent the mixture curdling
Mix in the almond extract
Fold in the rest of the self-raising flour and combine well
Gently fold the prunes, stirring with a wooden spoon until well distributed through the mixture
Spoon the mixture into the tin and level off the top with the back of the spoon
Sprinkle the top with the flaked almonds
Bake for 1&frac;12 hours or until a skewer inserted into the centre comes away clean
Once done, remove from the oven and allow the cake to cool in its tin
Store in an airtight lidded cake tin or plastic container