What is the equivalent of 3 cups plain flour to self raising flour?

You can't directly substitute plain flour for self-raising flour in a 1:1 ratio. This is because self-raising flour already contains baking powder, which is what makes it rise.

Here's how to convert 3 cups of plain flour to self-raising:

Option 1: Using Baking Powder

* 3 cups plain flour

* 2 teaspoons baking powder

Option 2: Using Self-Raising Flour

If you have some self-raising flour, you can use a little less to compensate for the added baking powder:

* 2 1/2 cups self-raising flour

Important Notes:

* Gluten: Self-raising flour generally has a lower gluten content than plain flour. If you are making something that requires a lot of gluten development (like bread), you might need to adjust the recipe further.

* Liquids: You might need to adjust the amount of liquid in your recipe slightly, as self-raising flour tends to absorb more liquid than plain flour.

Always refer to the specific recipe you are using for the most accurate instructions.