I don't usually use a recipe for potato soup, but have found that ost places I've had it they taste pretty much the same...depending on what you put into it. Here's the recipe from WDW:
LOADED POTATO SOUP
from Olivia's, Old Key West Resort
1½ lb potatoes, baked, coarsely diced
3 oz broccoli, diced
3 oz onion, diced
¼ tsp white pepper
4½ oz sour cream
1 1/3 qt chicken broth
3¾ oz roux*
GARNISH
cheddar cheese, shredded
bacon bits
Bring chicken broth to boil. Add onions, broccoli and pepper. Boil 10-15 minutes or until broccoli is tender. Add potatoes. Bring to boil. Add roux, stirring constantly. Reduce to simmer 10-15 minutes. Fold in sour cream. Simmer 5-10 minutes. Garnish with shredded cheese, top with bacon. Serves 10.
*Roux
1 2/3 lb butter
1¾ lb all-purpose flour
In saucepot, melt butter. Slowly add flour, stirring constantly to avoid lumps. Cook 10-20 minutes (med low heat). Roux should be smooth with almond aroma. Quickly remove from heat.