Help - how much of what do I need to add to plain (spelt) flour to make it suitable for a sponge ?

[indignatio]

The title really sums up the issue - Oh wonderful, wise mnetters, please help.

Baking powder. Something like 3 tsps per 8oz.

do you have baking poweder?

SD thank you.

I have baking powder - re "something like" - how sure are you on the quantities ?

I'll check. Wanted to be sure you had it first

It is indeed 3 teaspoons of baking powder per 8oz plain flour

Thank you so much

At the risk of being dippy - level or heaped teaspoons ?

I don't actually know. I think I usually use slightly heaped ones, assuming that too much is better than too little!

Ok - I'll try slightly heaped - thanks again