No you use self rasing flour in cakes
No you cant use yeast to make rice but you can use it to make bread i think. Who would use yeast when making rice? Yes, you can use yeast in a similar manner with rice flour as you do with flour that's made from wheat.
Yes you can. i believe it is the best way.
The function of rice flour in biscuit making is to make the biscuit crumbley and to add texture. Rice flour is good for people who live on a Gluten free diet therefore it is also a healthier option.
the best flour to use would be all-purpose flour.
No. They used regular flour.
King Arthur flour says 200°.
Usually you can, yes.
A good substitute for corn flour if is being used for thickening, is potato starch. You can also use regular flour that has been mixed and cooked with a small amount of butter in a skillet beforehand.
No. Rice flour is made from rice. Plain flour is refined wheat flour. Self rising flour is refined wheat flour with baking powder and salt already in it. Wheat flour has gluten, rice flour does not and cannot be used to substitute for wheat flour.
No, because the shortbread will rise. You can use plain flour or rice flour instead though. it would be really nice.
You could simply use Almond flour or Wheat flour in place of the buckwheat flour.