Balsamic French Onion Soup

Here at saladcheese, we don’t just believe cheese belongs to the world of macaroni and sandwiches. It’s as versatile as salt, helping to liven up a simple meal with complex flavors and delightful gooeyness.

This is another one of those meals that will aromatically linger throughout the house. If you’re down with the smell of caramelized onion pervading your couch, then this one is for you.



  • 1 yellow onion, thinly sliced
  • 1 red onion, thinly sliced
  • 1 white onion, thinly sliced
  • 5 garlic cloves, minced
  • 2 tbsp butter
  • 4 tbsp balsamic vinegar (plus a bit more for topping)
  • 1 tbsp brown sugar
  • 3 tbsp flour
  • 12 oz amber or dark beer
  • 6 cups beef stock
  • 2 tbsp fresh thyme
  • Kosher salt and pepper
  • French baguette, sliced thinly
  • 4 oz shredded Fontina cheese

Slice the onions and place in a 5-qt slow cooker on high. Add garlic, butter, balsamic vinegar, and brown sugar. Cook on high for one hour.

After the hour, add flour, beer, beef stock, thyme, and salt and pepper to taste. Cook on low for 6 to 8 hours.

When done, preheat oven to broil. Ladle soup into four decent-sized soup mugs. Top each with a thin slice of baguette. Drizzle a bit of balsamic on each mug. Divide cheese into four portions and pile on each soup mug. Place mugs on a well-supported baking tray lined with foil and broil for 2-3 minutes until cheese is nice and bubbly.

Makes 4 servings. Enjoy!


About Gerard

Fun-loving, well-read foodie.
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