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French Onion Soup

French Onion Soup

French onion soup often a staple in restaurants, actually originated as a humble peasant soup made with just onions, stale bread, and water. Today’sversions might be a bit fancier, but this soup is still tasty and simple to make at home. The key is patience. The onions need to be cooked low and slow so that they sweeten and turn a rich brown caramel color without burning. In addition to giving the onions the proper time and attention, I add a bit of sugar to make the sweetness of the onions, and I also stir in a bit of flour to add ingredients to the broth—two tricks I picked up working in a French restaurant that made the best French onion soup ever. Finally, to add even more flavor, I top the croutons with two types of cheese.
5 from 1 vote
Prep Time 15 minutes
Cook Time 55 minutes
Course Dessert, Soup
Cuisine American, French
Servings 6 People
Calories 675 kcal

Equipment

  • Dutch oven
  • Mixing bowls
  • pot
  • cups

Ingredients
  

  • 6 pound large red or yellow onions (about 3 pounds)
  • 4 tbsp extra virgin olive oil
  • 2 tbsp butter
  • 1 tbsp sugar
  • kosher salt
  • 2 cloves garlic, minced
  • 8 cup beef stock, chicken or a combination of the two
  • 1/2 cup dry vermouth or dry white wine
  • 2 bay leaves
  • 1 tbsp tablespoon fresh thyme leaves, a few sprigs of fresh thyme, OR 1/2 teaspoon dried thyme
  • 1/2 tbsp teaspoon freshly ground black pepper
  • 8 slices (1 inch thick) French bread or baguette
  • 1 1/2 cup  grated Gruyere cheese
  • Sprinkling grated Parmesan cheese

Instructions
 

  • Melt butter in a heavy based casserole pot over medium heat. When it starts to foam, add onions and stir to coat in butter.
  • 30 min on medium low: Turn heat down to medium low. Cook for 30 minutes stirring every few minutes, until the onions have softened and are semi transparent. 
  • Salt, 20 min on medium-high: Turn the heat up to medium or medium-high. Add salt, and cook for a further 20 - 30 minutes, stirring more regularly, until onions are deep golden and sweet.

Notes

The Secret Ingredient Is Time

The second most important thing is to properly caramelize the onions. Caramelizing the amount of onions needed in this recipe will take at least 40 minutes. Caramelizing is a chemical process that occurs when the sugars in the onions reach a certain temperature.
This only happens after a long cooking time (the addition of a little extra sugar will help). The more caramelized, the deeper the color of the onions and the more flavor you'll get from them.
NOTE: Much of the taste of this soup depends on the stock that you are using, and stock varies in its taste. Depending on your stock, you may need to bump up the flavor with some beef bouillon (we recommend the Better than Bouillon brand).
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