Granulated sugar shouldn't be used as a substitute where powdered sugar is specified in a recipe; granulated sugar will be too coarse.
yes yes
You should be able to substitute granulated sugar doe castor sugar without any significant detriment to the resulting product.
Confectioner's Sugar (powdered sugar) has a completely different consistency and quality than granulated sugar. You cannot substitute one for the other.
Yes, grind well in a blender. Double check your measurements after you do.
rwgular sugar is granulated sugar. the other kind is confectioner's sugar, or powdered sugar
Caster sugar has finer granules than regular (or "granulated") sugar. For cupcakes, you should be able to use regular sugar instead of castor without any detriment to the final product.
If you don't mind having crunchy icing.
You use granulated sugar unless otherwise noted.
Yes, you can use caster sugar instead of granulated sugar. However, be careful on the measurements. Use a little less caster sugar. Caster sugar is finer granulated sugar. It is not as fine as powdered sugar, but it is in between granulated and powder. Caster sugar dissolves more easily,so it is very beneficial in making meringues.
Yes you can but you may be comrpromising flavour depending on what your are making.
Granulated sugar
Yes, you can substitute white granulated sugar for cane sugar, since most sugars do come from cane. The important thing is to use granulated (not powdered), and to use white if that's what's called for, and to use brown sugar if that's what's called for.