convert plain flour to self raising

[Gloriamumble]

I have loads of plain flour but no self raising. I also have bicarb and baking powder. I need to make dh's birthday cake today and I'd rather not have to go shopping first - how much baking power and/or bicarb do I need to add to plain flour to make it self raising?

don't know, but hope this helps your post rise to the top of active convos!

uktv.co.uk/food/thread/threadid/17710

thank you! First suggestion on link was to check baking powder instructions - didn't think of that d'oh!