Where does icing sugar as in the from cakes come from?

Icing sugar, also known as powdered sugar or confectioners' sugar, comes from refined cane sugar or beet sugar. Here's the process:

1. Sugarcane or beet sugar is refined: This involves removing impurities and creating a pure sugar crystal.

2. The sugar crystals are ground into a fine powder: This is done using specialized mills.

3. Cornstarch is added: This prevents the sugar from clumping together and helps it flow freely.

So, while it may seem like a completely different product, icing sugar is essentially just finely ground sugar with a bit of cornstarch for texture.