Making self-raising wholemeal flour for the Ultimate Carrot Cake
I am making Delia’s Ultimate Carrot Cake. I can’t buy SR wholemeal flour so I googled to find out how much baking powder to add to 200g wholemeal flour to make it SR. I got so many different answers I am very confused. Can you advise how many teaspoons of baking powder I should add, including whether they should be flat or heaped?