You use granulated sugar unless otherwise noted.
Granulated sugar shouldn't be used as a substitute where powdered sugar is specified in a recipe; granulated sugar will be too coarse.
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.
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.
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rwgular sugar is granulated sugar. the other kind is confectioner's sugar, or powdered sugar
Organic sugar and granulated sugar is not the same thing
You can use regular granulated sugar to make ice cream.
Cornstarch is added to confectioners (powdered) sugar to prevent the sugar from lumping, so the amount is quite minimal. And adding cornstarch to granulated sugar isn't what makes it confectioners sugar. Confectioners sugar is much finer and softer than granulated sugar, it has a texture much like that of cornstarch. So you would have to be able to grind granulated sugar into a very fine powder in order to make it like confectioners sugar.
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.