1. 26-11-2008 19:27

How long does it take?

2. 26-11-2008 19:55

It will vary depending on the pan you use. A wider mouth pan, such as a large skillet or sauce pan will have more surface area, so it will evaporate more quickly.  
 
Also, this direction should be updated. There is no reason to stir constantly, you can do other stuff while you are preparing it too. Just be sure it doesn't boil, and stay in the kitchen, checking in often to stir and make sure it doesn't burn to the pan.