Heat olive oil in a large pot over medium heat. Add diced onion and sauté for 5 minutes until softened and translucent.
Add minced garlic and grated ginger. Cook for 1-2 minutes until fragrant, stirring frequently to prevent burning.
Add chopped carrots and vegetable broth to the pot. Bring to a boil, then reduce heat to medium-low and simmer for 15-20 minutes until carrots are fork-tender.
Remove from heat. Use an immersion blender to blend the soup until completely smooth. If using a standard blender, work in batches and allow soup to cool slightly first.
Return soup to pot if needed. Stir in coconut milk, miso paste, soy sauce, and sriracha. Whisk until miso paste is fully dissolved with no lumps.
Heat through gently over low heat for 2-3 minutes. Do not boil after adding miso to preserve probiotic benefits.
Season with salt and pepper to taste. Ladle into bowls and garnish with sliced green onions and fresh cilantro.
Notes
White miso paste has a milder, sweeter flavor than red miso. Choose based on your preference.
Adjust sriracha to your spice tolerance. Start with less and add more at the end.
Don’t boil the soup after adding miso paste to preserve beneficial probiotics.
Full-fat coconut milk creates a richer soup, but light coconut milk works too.