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Caramelized Onion Soup

Emma Sullivan By Emma Sullivan 4.9 (312 reviews)
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Caramelized Onion Soup

Caramelized onion soup takes the classic French onion soup concept and amplifies it by focusing on the art of perfect caramelization. The slow, patient cooking transforms ordinary onions into something magical - deeply sweet, complex, and utterly irresistible.

This soup requires time but minimal effort. The onions do all the work as they slowly release their sugars and develop a rich mahogany color. The result is a soup that's both elegant and deeply comforting.

Caramelization Science

  • Low and slow: Key to deep flavor
  • Maillard reaction: Creates complexity
  • Patience required: 45-60 minutes minimum
  • Don't rush: High heat burns, not caramelizes

Tips for Perfect Caramelization

  • Use a wide, heavy-bottomed pot
  • Slice onions evenly for uniform cooking
  • Stir occasionally, not constantly
  • Add a pinch of sugar to speed up

Serving Suggestions

  • Crusty bread for dipping
  • Gruyère cheese on top
  • Fresh thyme garnish
  • Special occasion worthy
Sauté the aromatics until fragrant to build the flavor base.
Sauté the aromatics until fragrant to build the flavor base.

Caramelized Onion Soup

A rich, deeply flavored soup featuring perfectly caramelized onions. Sweet and savory perfection.

Prep: 20 min
Cook: 70 min
Total: 90 min
Servings:
6

Nutrition per serving

245 Calories
6g Protein
28g Carbs
12g Fat
3g Fiber

Ingredients

Instructions

  1. . Slice onions thinly.
  2. . Caramelize slowly for 45-60 minutes.
  3. . Deglaze with sherry. Add broth.
  4. . Simmer 20 minutes. Season and serve.

Recipe Notes

  • Gratinée style: Top with cheese and broil until bubbly.
  • Make ahead: Onions caramelize well in advance.
  • Slow cooker: Caramelize onions on low 8-10 hours.
  • Storage: Refrigerate 5 days. Freezes well 3 months.