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Slow Cooker Japanese Onion Soup


This soup couldn't be more simple and is a great addition to any asian style dinner. I had this broth simmering on my counter all day long, and the outcome was nothing short of fantastic.

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Rate this recipe 4.1/5 (58 Votes)


  • 2 medium carrots
  • 2 medium celery stalks
  • 2 garlic cloves, smashed
  • 6 cups chicken broth, reduced sodium fat free
  • 1 medium Onion, cut into wedges
  • 8 ounces mushrooms, sliced
  • 4 green onions, sliced (Optional Garnish)


Servings 6
Adapted from


Step 1

Place everything but the mushrooms and green onions into a slow cooker.

I added in the bottom halves of the chopped green onions at this time as well and reserved the green upper halves for garnishing.

Cover and cook on high for 2-4 hours or low for 4-5 hours.

An hour before serving remove the cooked veggies from the crock pot with a slotted spoon

Place the sliced mushrooms into the crock pot with the broth.

Give it all a good stir.

Cover to cook for another hour or until the mushrooms are tender.

Divide amongst the bowls and serve!

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