What is the main difference between extrafi ne, coarse, and superfi ne sugars? What is another name for each? Coarse sugar is more expensive than regular granulated sugar. In fact, it can be three...

What is the main difference between extrafi ne, coarse, and superfi ne sugars? What is another name for each?

Coarse sugar is more expensive than regular granulated sugar. In fact, it can be three times the price of regular granulated sugar. Why use it?