Plain Flour Cake Recipe (Banana cake)

What happens if you forget to put baking powder in your cake (ie make it with plain not self raising flour)?
I always thought you would get a solid lump nothing like a cake. However I discovered by accident that this is not the case. The cake still rises and is crumbly, just not so much. A nice moist squidgy finish.

8oz plain flour
4oz sugar
4oz oil (eg sunflower)
2 eggs
Splash of milk
Pinch of salt
1 banana
Handful of chocolate drops or chopped chocolate

Mix flour, salt, sugar, eggs and oil in a bowl until smooth. Add the milk and mix again.
Mash the banana, add it with the chocolate drops and mix again.

Bake in bread maker (we can't set the temperature on ours, it decides) or in a cake tin at 170 for about an hour. Remove when it tests done with a skewer.

I put some marmalade on top of this one