Caramelized Onion Soup Au Gratin (Low Carb, but You Won't Notice

READY IN: 45mins
Recipe by Julesong

The secret behind this lower-carb recipe is the slow, low heat for the carmelization of the onion. Don't rush it - you won't regret it! Very tasty!

Top Review by irishtwinsny

So delicious! I made 4 servings, broiled them in individual soup bowls. I omitted the Wasa. I served it with grilled roast beef and roasted red pepper sandwiches, but the soup is definitely good enough to stand alone.

Ingredients Nutrition


  1. In a 3- to 4-quart pan, combine onion, shallots, butter, and Splenda over medium heat.
  2. Cook, stirring often, until onion is slightly caramelized and tastes very sweet, about 35 minutes.
  3. (If onion begins to brown too quickly, reduce heat to medium-low.) To pan, add broth and sherry.
  4. Bring to a simmer over medium-high heat.
  5. Pour soup into ovenproof bowl.
  6. Top with Wasa and cheese.
  7. Place bowl on baking sheet; broil 6 inches from heat until cheese is bubbling and lightly browned, about 3 minutes.

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