Keto Cod Miso Soup with Shiitake Mushrooms

This Keto Cod Miso Soup with Shiitake Mushrooms is a warm, savory, and nourishing dish that brings traditional Japanese flavors to your low-carb lifestyle. Made with tender pieces of cod, earthy shiitake mushrooms, and umami-rich miso, this soup is not only keto-friendly but also deeply satisfying and perfect for a light dinner or an elegant starter.

Why You’ll Love This Recipe

This recipe is the perfect blend of comforting and healthful. The combination of miso, coconut aminos, garlic, and ginger delivers a flavor-packed broth that feels both light and hearty. The cod provides lean protein, while the shiitake mushrooms add texture and depth. Whether you’re following a ketogenic diet or simply seeking a nutritious meal, this soup offers warmth, flavor, and nourishment in every bite.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

• 1 pound cod fillets, cut into bite-sized pieces

• 4 cups water

• 2 cups low-sodium vegetable broth

• 3 tablespoons white miso paste

• 1 tablespoon coconut aminos or soy sauce (ensure gluten-free for keto)

• 1 teaspoon sesame oil

• 2 cloves garlic, minced

• 1 inch piece of ginger, grated

• 8 ounces shiitake mushrooms, sliced

• 2 green onions, thinly sliced

• 1 tablespoon dried wakame seaweed (optional)

• Salt and pepper, to taste

Directions

1. Prepare the ingredients: slice shiitake mushrooms, mince garlic, grate ginger, and cut cod into bite-sized pieces.

2. In a large pot, combine the water and vegetable broth. Bring to a gentle simmer over medium heat.

3. In a small bowl, dissolve the miso paste with a bit of hot broth. Once smooth, return it to the pot and stir well.

4. Add coconut aminos (or soy sauce), sesame oil, garlic, and ginger to the pot. Stir to combine.

5. Add sliced shiitake mushrooms and let them simmer for about 10 minutes until tender.

6. Gently add cod pieces to the soup. Simmer for 5-7 minutes, or until the cod is cooked and flakes easily.

7. If using wakame seaweed, rehydrate it in warm water for a few minutes, then drain and add it to the pot.

8. Taste and season the soup with salt and pepper, being mindful of the salt content in the miso and soy sauce.

9. Serve hot, garnished with sliced green onions.

Servings and timing

• Servings: 4

• Prep time: 10 minutes

• Cook time: 20 minutes

• Total time: 30 minutes

Variations

• Swap the cod: Use salmon, shrimp, or tofu for different protein options.

• Add greens: Spinach, bok choy, or napa cabbage can add extra nutrients and texture.

• Spicy twist: Add a dash of chili oil or a few red pepper flakes for heat.

• Different mushrooms: Try enoki or oyster mushrooms in place of shiitake.

• Umami boost: Add a splash of fish sauce or a few drops of anchovy essence for a deeper flavor.

Storage/Reheating

Store any leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently on the stovetop over low heat, making sure not to bring the soup to a boil, as this can overcook the cod. Freezing is not recommended as the texture of the fish may change.

FAQs

What type of miso should I use for this recipe?

White miso paste is recommended for its mild flavor, but you can also use yellow miso for a stronger taste.

Is miso soup keto-friendly?

Yes, as long as it’s made with low-carb ingredients like in this recipe. Avoid added sugars or high-carb noodles.

Can I use frozen cod?

Yes, just thaw it completely and pat it dry before adding to the soup.

Is wakame seaweed necessary?

No, it’s optional. It adds authenticity and nutrients but the soup is delicious without it.

Can I add tofu to this soup?

Yes, firm tofu is a great addition and still keto-friendly. Add it with the cod to warm through.

How can I make this soup spicier?

A drizzle of chili oil or a pinch of red pepper flakes can add a nice kick.

What can I use instead of coconut aminos?

Soy sauce or tamari works well. Be sure it’s gluten-free if needed.

Can I make this soup ahead of time?

Yes, but it’s best enjoyed fresh. If making ahead, add the cod when reheating to avoid overcooking.

What other vegetables go well in this soup?

Bok choy, zucchini, or spinach are great low-carb additions.

How do I avoid overcooking the cod?

Add the cod at the end of the cooking process and simmer gently until it flakes easily.

Conclusion

This Keto Cod Miso Soup with Shiitake Mushrooms is a quick, nourishing, and flavorful meal that fits beautifully into a low-carb lifestyle. Whether you’re warming up on a chilly day or craving a light yet satisfying dinner, this soup brings comfort and rich umami flavor in every spoonful. Try it once, and it just might become a staple in your keto kitchen.

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