Print Recipe
4 from 2 votes

Prep Time10 mins
Cook Time6 hrs
Total Time6 hrs 10 mins
Course: Dairy Free, Gluten Free, Grain Free, Paleo, Refined Sugar Free, Specific Carbohydrate Diet Legal, Vegan, Whole30
Servings: 4


  • 2 tbsp ghee/butter (or olive oil to make it vegan)
  • 5 large onions sliced
  • 1/4 tsp salt
  • 1 tbsp balsamic vinegar
  • 1 tsp thyme
  • 1 cup apple juice
  • 4 cup beef stock (or veg stock to make it vegan)


  • Turn the slow cooker on to sear/sauté and melt the ghee. Add in the onions, sprinkle with salt and leave to cook for approximately 30 minutes until the onions have turn golden in colour and begun to caramelise. 
  • Once the onions are soft and caramelised add in all of the remaining ingredients, turn the slow cooker to high heat and cook for 4-6 hours. 
  • Sprinkle the soup with fresh thyme before serving.