Castor sugar is a superfine form of regular granulated white sugar (also known as "berry sugar"). Substituting regular sugar in its place can be done for some recipes without any consequence. In other recipes, there can be a difference in the texture of the final product (i.e it may be more gritty instead of smooth).
Granulated sugar and caster sugar are basically interchangeable in recipes. The same weight of each for each. But icing sugar/confectioner's sugar is not interchangable with any other kind of 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.
Finely ground sugar is Castor sugar also called superfine sugar. Icing sugar is also a very finely ground sugar
You should be able to substitute granulated sugar doe castor sugar without any significant detriment to the resulting product.
Castor sugar.
Dissolving will depend on surface area. Castor sugar has a smaller particle than regular sugar. The smaller the particle the larger the surface area. Surface area: Regular sugar < castor sugar < icing sugar. Castor sugar should dissolve faster than the same mass of regular sugar but slower than the same mass of icing sugar.
Castor (or caster) sugar is a type of British fine sugar. It is called castor because its grains are small enough to pass through a sugar caster (sprinkler).
granulated sugar means less fine sugar. fine sugar is the same as castor sugar!
One tsp is 5gm. 40gm of castor sugar is approximately 8 tsp.
Like granulated/table sugar, caster/or sugar comes from sugar cane or sugar beet Castor, or caster, sugar is exactly the same as regular granulated sugar, simply ground to a very fine flour-like consistency Please do not confuse castor/er sugar with confectioners, or icing or fondant sugar which contains 3% starch to prevent clumping You can make castor/er sugar yourself by blending or processing regular granulated table sugar for a few minutes Use it promptly to avoid clumping
Like granulated/table sugar, caster/or sugar comes from sugar cane or sugar beet Castor, or caster, sugar is exactly the same as regular granulated sugar, simply ground to a very fine flour-like consistency Please do not confuse castor/er sugar with confectioners, or icing or fondant sugar which contains 3% starch to prevent clumping You can make castor/er sugar yourself by blending or processing regular granulated table sugar for a few minutes Use it promptly to avoid clumping
Depends on what the sugar is for. If it is to sweeten then there will be no difference to flavour, but you will feel the sugar as you eat it. If it is to feed yeast then you can use it but you should use more yeast because it needs to work harder to get it's food, alternatively you could disolve the sugar in water.
Castor sugar, it is finer than regular sugar and dissolves faster.