In our first attempt we mistakenly used Self Raising Flour instead of All Purpose Flour. This was because I am Australian and we say “Plain Flour” rather than All Purpose. This mistake set me off to look at what “Cake Flour” actually was …
What we did
Anyway we repeated our experiment and two lots of cup cakes: with all ingredients and without baking powder. And we got the expected result.
The first one rose and the second stayed pretty much as flat as it started out.
It was more like undercooked pancake than a cup cake.
What we learnt
To make a cake, you need flour, you need eggs, you need baking powder, you need oil.
We get it.