I'm trying to make cupcakes for my daughter's birthday party, I made a load following Luisa Zissman's book (in my defence that was the only book I could see quickly in the library and my daughter was moaning at me), and I was in a rush and put the flour in with the butter and sugar at the beginning. They tasted fine, is it worth it to try again but fold in the flour this time to make them airier? It looks a lot of faff....thanks!