On behalf of my country, I apologise!

[Joe Guy]

Of course. If I recall correctly, that would be called powdered sugar. In industrial food production, it is used where a quick dissolving sugar is required. Domestically, it is principally used to make icing or frosting and other cake decorations. It is often lightly dusted on to baked goods to add a light sweetness and subtle decoration.

[Scooter]

Except that if you buy powdered (icing) sugar, it contains cornstarch and so shouldn't be substituted for pure sugar in baking.

[dales]

Ah, confectioner's sugar.

[oldr_n_wsr]

How sweet it is.