Crockpot Caramelized Onions

6 Vidalia onions (approximately 2-1/2 pounds), about 3- 4 inches in diameter, stem and root ends sliced off, peeled and left whole
1 stick butter (8 Tblsp.)

Place the onions and butter in a slow cooker and cook on low 12 - 24 hours until the onions are deep golden brown and very soft.

Different slow-cookers will take different amounts if time - it's almost impossible to overcook this.

Use the onions and liquid to flavor soup, stock, stews.