This soup was shared recently by Jeannie(Hayburner)!
Crockpot French Onion Soup
(makes 8 servings, though it can be halved successfully)
3 large onions, sliced (3 cups)
3 tbls butter, melted
3 tbls flour
1 tbls worcestershire sauce
1 tsp sugar
1/4 tsp pepper
4 cans (14 1/2 oz each) beef broth
Mix onions and butter in crock pot. Cover and cook on high heat setting for 30 minutes or until onions begin to brown around the edges. Mix flour, worcestshire sauce, sugar and pepper. Stir flour mixture and broth into onions. Cover and cook on low heat setting 7-9 hours (or high heat 3-4 hrs) or until onions are very tender. Ladle in bowls and top with a slice of cheesy broiled french bread (below)
Cheesy Broiled French Bread
8 slices french bread, 1 inch thick
3/4 cup shredded mozzarella cheese
2 tbls grated parmesan cheese
Set oven control to broil. Place bread slices on rack in broiler pan. sprinkle with cheeses. Broil with tops 5-6 inches from heat for 2 - 3 minutes or until cheese is melted.