One tsp of double acting baking powder to one cup of flour.
Generally you use 1 to 2 teaspoons of baking powder to each cup of flour.
One to one and a half teaspoons of baking powder and a pinc to one half teaspoon of salt to a cup (125 g) of flour.
Self raising flour makes the cake rise, but if you don't have any you can use plain flour and baking powder which has the same effect. 225g plain flour and 4 teaspoons baking powder, will transform it into self raising flour.
I don't know how much volume 4 oz. will be, but most recipes use the ratio of 1 teaspoon of baking powder to 1 cup of flour. Weigh the flour, measure it and find the amount of baking powder that way.
Baking powder - add two teaspoons of baking powder to each cup of plain flour. In America they call "plain flower" all "purpose flour", in Australia where I am from we have 2 main types Plain & self raising. :)
Self-raising flour typically contains about 1 to 1.5 teaspoons of baking powder per cup of flour. Since 375 grams of self-raising flour is approximately equivalent to 3 cups, it would contain about 3 to 4.5 teaspoons of baking powder. However, the exact amount can vary by brand, so it's always best to check the packaging for specifics.
About 1.5 teaspoons. If the recipe calls for self raising flour and you don't have any then add 1.5 teaspoons of baking powder and 0.5 teaspoons of salt.
Add about a teaspoon of Baking Powder and one of Bicarbonate of Soda to the flour per pound of flour. If you find Baking Soda tastes bitter then you can add a tsp of Cream of Tartar instead. Or you could put say one and a half teaspoons of Baking Powder.
Hmmm. One can not substitute flour with baking powder. One can however substitute selfraising flour with ordinary flour and a few teaspoons of baking powder. (My best guess would be approx 1 teaspoon of baking powder per 150-200 grams of flour.)
For one cup of self-rising flour I use 1 cup all-purpose flour, and add: 1 1/4 teaspoons baking powder AND 1/8 teaspoons salt
Yes, 4 teaspoons of baking powder is generally considered a lot for a cake. Most cake recipes typically call for about 1 to 2 teaspoons of baking powder per cup of flour. Using too much can result in a cake that rises excessively and then collapses, leading to an undesirable texture and taste.
To turn all-purpose flour into self-rising flour, simply add baking powder and salt to it. For every cup of all-purpose flour, mix in 1 1/2 teaspoons of baking powder and 1/4 teaspoon of salt. This will give you the equivalent of self-rising flour for your baking needs.