Francois' French Onion Soup

Thirty minutes of low, patient cooking transforms four cups of sliced onions into a sweet, golden mass that forms the soul of this soup. No rushing, no shortcuts. That slow caramelization is where all the deep, savory sweetness comes from.

Beef broth, bay leaf, thyme, and black pepper build the classic base, but it’s the two tablespoons of port wine stirred in at the end that add a subtle richness you won’t find in most versions. Port brings a fruity warmth that plays against the savory onions without tasting boozy.

The whole soup can be made a day ahead and refrigerated, which actually improves the flavor. When you’re ready to serve, ladle it into ovenproof bowls over toasted baguette slices, pile on Swiss cheese and Parmesan, and broil until bubbly and golden.

Pro Tips

• Cook the onions over low heat for the full 30 minutes. Medium heat browns them too fast without developing sweetness
• Toast the baguette slices first so they hold up under the broth instead of turning to mush
• Place the bowls on a baking sheet before broiling for easy handling
• Watch closely under the broiler. One minute is all it takes for golden cheese, two minutes means burnt

Variations

• Use Gruyère instead of Swiss for a nuttier, more traditional French flavor
• Swap port for dry sherry or a splash of cognac
• Add a teaspoon of Dijon mustard to the broth for a sharper edge