Hot and Sour Soup
Hot and Sour Soup is a tangy and warming bowl that mixes silky tofu, chewy shiitake mushrooms, and savory chicken broth for a comforting, easy weeknight dinner. Bright rice vinegar lifts the broth while white pepper adds gentle heat, making this soup both lively and soothing. Try it when you want a quick, flavorful meal that feels like home.
Equipment
- 3 quart saucepan
- Small Bowl
- Whisk
Ingredients
- 6 dried shiitake mushrooms Rehydrate to regain texture and concentrated umami; soak in warm water for 20–30 minutes, then slice thinly and add to the soup for earthy depth.
- 2 -3 small wood ear mushrooms, (optional) Optional add-in to provide a slightly crunchy, gelatinous texture; hydrate briefly, slice into thin strips, and stir in toward the end for contrast.
- 3 tablespoons cornstarch Thicken to create a glossy, velvety broth; whisk with cold water to make a slurry before adding to the simmering soup to avoid lumps.
- cup water Measure to adjust consistency precisely; use to dissolve the cornstarch slurry and moderate the soup’s thickness for desired mouthfeel.
- 2 tablespoons canola or vegetable oil Sauté for a neutral frying medium that allows aromatics to soften without overpowering; heat until shimmering before cooking onions and mushrooms.
- 1 small yellow onion, finely chopped Sweat finely chopped to build sweet aromatic layers; cook gently until translucent to release sugars and form the flavor base of the soup.
- 6 cups chicken broth Simmer as the flavorful liquid backbone; use to poach mushrooms, tofu, and aromatics while carrying savory depth throughout the dish.
- 1 cup firm tofu, drained and diced into 1/4-inch cubes Cube for a tender protein component that absorbs flavors; drain and dice into small cubes, then gently simmer in the broth to warm through.
- 4 tablespoons rice vinegar Acidify to brighten and balance savory and spicy notes; stir in near the end to preserve its tang and lift the overall flavor profile.
- 1 tablespoon soy sauce Season to contribute savory, salty, and umami notes; add during cooking to deepen the broth and adjust to taste for balanced seasoning.
- 1 egg, beaten Enrich by creating delicate ribbons and silk in the hot broth; beat well and drizzle slowly while stirring to set into soft strands.
- 1 teaspoon toasted sesame oil Finish with a nutty aroma and subtle richness; add a small amount off the heat to preserve its aromatic quality and enhance flavor depth.
- 1/4 teaspoon Kosher salt Season sparingly to control overall saltiness and enhance other flavors; add a measured amount and adjust after tasting the finished soup.
- teaspoon ground white pepper Spice lightly to impart warm, aromatic heat without black pepper’s sharpness; add a small measured amount and taste to avoid overpowering.
- 2 -3 green onions, chopped for garnish Garnish to add fresh, mild oniony crunch and color; chop and sprinkle over bowls just before serving for a bright finishing touch.
Instructions
- Place the dried shiitake and wood ear mushrooms (if using) in a small bowl. Cover with hot water and soak for about 30 minutes. Squeeze the mushrooms dry, reserving the soaking water. Cut off the shiitake mushroom stems, discard, and slice the mushroom caps. Trim away any tough stems from the wood ears, and finely chop.: You will notice an earthy aroma rising as the mushrooms rehydrate, and the soaking water darkens with umami. This soaking step unlocks intense mushroom flavor and softens the texture so they integrate well into the broth. A common mistake is rushing the soak, which leaves the mushrooms tough, so make time for the full soak. After squeezing them dry, reserve the soaking liquid, strain it to remove grit, and use it to deepen the broth, because that liquid concentrates the mushroom essence.
- In a small bowl, add the cornstarch and mix in the water to make a smooth paste.: The slurry should be completely smooth and glossy, without lumps, which you can feel as a uniform texture when you stir. If the paste has lumps, the broth will get cloudy and grainy, so whisk until silky. Use cool water to disperse the starch evenly; warm water encourages premature thickening. A troubleshooting tip, if it appears too thick, add a splash more water and stir, because the right consistency will thicken the soup without making it gummy.
- In a 3 quart saucepan, heat the oil over medium. Add the onion and cook until soft, 3-5 minutes. Add the chicken broth, mushrooms, wood ears, and soaking water. Bring to a boil, then reduce to a simmer for 15 minutes.: As the onion sweats, you'll smell a gentle sweetness that builds the soup's foundation. When you pour in the chicken broth and reserved mushroom liquid, the steam carries savory, rounded notes. Bringing to a boil then reducing to a simmer extracts flavor and allows the mushrooms to finish tenderizing; you should see small bubbles and a calm simmer. Avoid a rolling boil for too long because it can toughen ingredients. If the soup tastes flat after simmering, a pinch of salt or a splash more soy sauce can bring it to life.
- Stir in the cornstarch paste, and cook for 3 minutes to thicken. Add the beancurd, rice vinegar, soy sauce, kosher salt, and white pepper.: After you stir in the slurry you will notice the broth become glossy and slightly viscous within minutes, clinging to the tofu and mushrooms. This mouthfeel gives the soup a luxurious presence. Stir gently and keep the simmer steady, because high heat can break the starch down and make the texture thin again. A common error is adding the slurry too quickly, which can create lumps, so pour in slowly while whisking or stirring. Taste after adding the vinegar and soy sauce, and balance acid and salt gradually, because rice vinegar can brighten strongly.
- Bring the soup to a lazy boil then drizzle in the beaten egg letting it drop through a whisk to make threads in the soup. Stir in the sesame oil and serve with chopped green onion on top.: As the soup returns to a gentle boil you will see steam and small rolling bubbles, the perfect moment to add the beaten egg . Drizzling it through a whisk creates fine ribbons that cook instantly and add silky texture. The final stir of toasted sesame oil releases a fragrant nutty note that lifts the whole pot. Avoid pouring the egg too fast, which yields clumps instead of threads; a steady drizzle ensures elegance. Garnish with the chopped green onions right before serving so they stay bright and slightly crisp, adding a fresh contrast to the warm, rich broth.
Notes
- Soak Time Matters Allow the dried shiitake mushrooms to soak for at least 30 minutes in hot water so they rehydrate fully and release concentrated umami into their soaking liquid, which you should reserve and strain to add back to the broth for depth.
- Make a Silky Slurry Mix the 3 tablespoons of cornstarch with cool water until perfectly smooth, because a well dispersed slurry prevents lumps and yields a glossy, clingy broth that enhances the mouthfeel.
- Control the Sour Add the 4 tablespoons of rice vinegar gradually and taste as you go, because acidity transforms the soup quickly and you want to balance brightness with the savory elements, adjusting in small increments.
- Egg Technique Pour the beaten egg in a thin stream through a whisk into a gently boiling surface to create fine ribbons; pouring too quickly leads to curds instead of threads so steady motion is key.
- Finish with Sesame Stir in 1 teaspoon of toasted sesame oil at the end for an aromatic lift that does not cook off, because its oil soluble flavors shine brightest when added off heat.