Here are some different ways to go about carmelizing onions.

1. A whole bunch of ideas from the readers of Chow.com

2. A very detailed step-by-step method at Allrecipes.com

1. From About.com

Here’s How:

1. Slice onions into 1/4-inch wide rings.
2. Heat butter or combination of butter and oil in heavy skillet.
3. Add onions and a small amount of sugar (optional) and slowly cook over medium heat.
4. Cook until onions are caramel colored, stirring often, 30 to 40 minutes.
5. For more flavor, add a touch of vinegar at the end of cooking, stirring to deglaze the pan.

Tips:

1. Large, mild-flavored onions work best.
2. Carmelized onions can be frozen in an airtight container up to three months.
3. To remove onion smell from hands, wash with soap and then rub hands against a chrome faucet.