Slow-Cooker Caramelized Onions & Fennel

Slow-Cooker Caramelized Onions & Fennel

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From: Everyday Slow Cooker

These slow-cooker onions are an ideal condiment for burgers, steaks, a grilled chicken breast or sautéed fish. They also make a pleasing addition to a cheese board or topping for Brie. They're best eaten cold or warm, but not hot.

Ingredients 24 servings

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Original recipe yields 24 servings
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  • 3 pounds yellow onions, vertically sliced (about 10 cups)
  • 5 cups thinly sliced fennel (about 3 bulbs)
  • 3 tablespoons olive oil
  • 1½ teaspoons kosher salt
  • 1 tablespoon , plus 1 teaspoon chopped fresh thyme
  • 2½ teaspoons chopped fresh oregano
  • 1 tablespoon apple cider vinegar


  • Prep

  • Ready In

  1. Combine the onions, fennel, oil, salt, 1 tablespoon of the thyme, and 2 teaspoons of the oregano in a 5- to 6-quart slow cooker, tossing to coat. Cover and cook on LOW until the vegetables are golden brown, about 12 hours. Uncover and stir gently. Increase the heat to HIGH, and cook, uncovered, until the mixture thickens, about 2 hours, stirring every 15 minutes. Stir in the vinegar, and the remaining 1 teaspoon thyme and ½ teaspoon oregano.

Nutrition information

  • Serving size: ¼ cup
  • Per serving: 47 calories; 2 g fat(0 sat); 2 g fiber; 7 g carbohydrates; 1 g protein; 4 g sugars; 0 g added sugars; 138 mg sodium;
  • Carbohydrate Servings: ½

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