In a large pot, saute the onions with the butter (don't brown). Then, add the garlic and worcestershire.
Add 12 oz of beer and bring it to a gentle boil. The liquor will evaporate, but the taste will stay; making it kid friendly.
Add 14 oz of the chicken broth of your choice, 2 cups of milk, and 3 tablespoons of cornstarch. First, dilute the broth with a bit of water to form a paste and gently stir in the rest of the ingredients. When it starts to thicken, turn the heat down and while still stirring add 2 cups of shredded sharp cheddar cheese until it completely melts in. Be careful not to burn the bottom and constantly stir on a simmer. Garnish with a sprig of parsley and enjoy.