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Slow Cooker French Onion Soup

Let your appliance do all the hard work to make this spectacular slow cooker French onion soup! It's rich and flavourful, and topped with a giant cheesy crouton.
4.58 from 7 votes
Prep Time: 15 minutes
Cook Time: 9 hours
Total Time: 9 hours 15 minutes
Servings: 2 people
Calories: 488kcal
Author: Becca Heyes

Recipe printed from www.easycheesyvegetarian.com

Ingredients

For the slow cooker French onion soup:

  • 4 large onions sliced
  • 30 g (~ 2 tbsp) butter, roughly chopped
  • 1 tbsp caster sugar (optional)
  • 1 tbsp balsamic vinegar
  • 2 tsp minced garlic or garlic puree
  • 1 tsp dried thyme
  • 1 tsp black pepper
  • 750 ml (~ 3 cups) vegetable stock

For the cheesy crouton:

  • 2-4 thick slices French baguette
  • 2-4 tbsp grated cheese (I used cheddar)

Instructions

  • Add all of the soup ingredients to a slow cooker, and mix well to break up the onions. Cook on high for approximately 9 hours, or until the onions are a deep, rich brown colour, and very soft.
  • Serve on its own, or with a cheesy crouton. To make the cheesy crouton, dish up a bowlful of soup into a heat-safe bowl, and top with 1 or 2 thick slices of French baguette. Sprinkle over plenty of grated cheese, then place under a grill (broiler) for a few minutes, until the cheese is melted and slightly crispy. Serve immediately.

Nutrition

Nutrition Facts
Slow Cooker French Onion Soup
Amount Per Serving (1 bowl)
Calories 488 Calories from Fat 181
% Daily Value*
Fat 20.1g31%
Saturated Fat 12.2g61%
Cholesterol 53mg18%
Sodium 536mg22%
Potassium 557mg16%
Carbohydrates 65.1g22%
Fiber 8.1g32%
Sugar 20.1g22%
Protein 14.8g30%
Calcium 258mg26%
Iron 4mg22%
* Percent Daily Values are based on a 2000 calorie diet.

Nutritional information is approximate, and will depend on your exact ingredients. Please calculate your own nutritional values if you require accuracy for health reasons.