Preheat your oven to 160°C fan
Add all the ingredients to your bowl - ideally add flour, custard and icing sugar first, and just stir, then add the rest. Use a wooden spoon or a fork and mix thoroughly so there are no lumps.
Pour into a parchment lined tray and bake for 30 minutes - it could take up to 40 - if you shake it slightly and it wobbles it needs another few minutes.
We served as cake on its own, but warm with custard it was spectacular!
