Best onion soup in the world

I was going to take a picture of the soup before I posted this pic but got all excited and ate my whole bowl before I remembered. But here's a recipe to my mom's French Onion Soup, which I think is the best in the world. Enjoy!

Mom's French Onion Soup

Sweet onions – 2-1/2 to 3 lbs (yes, that's alot of onion!)
3 tablespoons of butter
1 tablespoon of oil
1 teaspoon salt
2 teaspoons sugar
3 heaping tablespoons flour
8 cans of beef broth
½ cup dry white wine
French bread
Garlic
Gruyere cheese
Swiss cheese

Slice onions.
Saute in a covered saucepan for 15 minutes over med/low heat with butter and oil.
Uncover sauce pan and add 1 tsp. salt and 2 tsp sugar. Raise heat to medium. Cook for 30-40 minutes stirring every few minutes to keep from burning.
Slowly add 3 heaping tablespoons flour, stirring constantly. Cook for 3 minutes until the mixture is thickened.
Turn off burner.
Heat beef broth in microwave/bring to a boil in another saucepan.
Turn burner back on and pour hot broth over onion mixture.
Add ½ cup dry white wine. Bring to a simmer and cook partially covered for 30-40 minutes. Season with salt and pepper as needed.
Thickly slice French bread. Butter lightly and add put some diced garlic on each slice. Toast under broiler until lightly browned.
Place bread in bottom of a soup bowl.
Add mixture of grated gruyere/swiss blend.
Pour hot soup into bowl.
Yummmmm......