Help! Need baking soda but only have baking powder

[StealthPolarBear]

Will it do? (Oat biscuits)
Or can I not just use sr flour instead of plain?

I would jsut use SR flour..

I get confused with those and bicarb. Two of them are the same. Have a look on the ingredients, if its got baking soda in it, then bingo!

it does but it s something to do with acidic ingredients
might risk the sr flour

I wouldn't have thought you would need oat biscuits to rise so I would go with the SR flour.

well, about to dollop them onto tray now...i'll let you all know
thanks

Do you combine baking powder with cream of tatar to make baking soda ??? ( or is it bicarb)

other way round - bacing soda is sodium carbonate
combined with cot makes baking powder, my research has shown
Anyway, they were nice, not how they were intended to be, I don't think but i love them