In a bowl, cream the butter and sugar until pale and smooth
Gradually fold in a little of the beaten egg and sifted flour
Grease the 10cm diameter cake tin
Pour in the mixture and make sure it is level
Bake for approx. 20 minutes in a 180-degree oven
Do keep an eye on it as ovens vary.
You know it is ready when you pop a skewer in the middle and it comes out clean.
For decoration, sprinkle with icing sugar, or split open and spread with your favourite jam. Serve with cream and seasonal fruit.