Wiktionary
self-raising
a. Of flour, capable of rise without added leavening agent.
Usage examples of "self-raising".
We used to produce twelve different types in here: plain, self-raising, granary, savoury, strong white—you name it.
Over the resulting mess in each room I shook six pounds of self-raising flour.
There were no obvious candidates nearby, unless the CIA had taken to recruiting seventy-year-old widows with what looked like a couple of bags of self-raising flour tipped over their faces.