Preheat the oven to 180°C and prepare a square or oblong baking dish
Mix all the ingredients together until the batter is smooth
Pour the batter into the prepare dish and bake for approximately 30 minutes or until a toothpick comes out clean
Remove from the oven and using the toothpick, poke small holes all through the top of the cake
Immediately after you take the cake from the oven, mix together the icing sugar and lemon juice until smooth.
While the cake is still hot, pour the icing over the cake.
Wait while the icing sinks into the cake and the cake cools before serving
The cake can be eaten hot with custard or ice cream or if you prefer a cool cake, I suggest you make the cake a day before and let the icing sink into the flesh of the cake, this makes it sticky and gooey all the way through.
An alternative to vanilla and lemon is chocolate and orange. Substitute chocolate cake mix and chocolate pudding for the vanilla and use orange juice instead of lemon (be sure to strain the orange juice so it is clear and free of any pulp).