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Traditional Japanese Noodle Soup

A miso-based soup with tofu, udon noodles, vegetables, and lemon peel.

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Why it works: Tofu and miso share more aroma than cooks usually use. They rank in the top 1% of all ingredient pairs, and cooks put them together in 75 recipes. Both carry acetic acid, which smells sour, vinegar. The science ↓

Traditional Japanese Noodle Soup

Time8 to 10 minutes

Ingredients

Directions

Prepare the tofu

  1. In a nonstick 10-inch skillet over medium-high heat, in hot vegetable oil, cook tofu, green onion, and ginger for 5 minutes or until golden brown.

Simmer the soup

  1. In a 4-quart saucepan over high heat, heat 8 cups of water to a boil.

  2. Add soup mix, noodles, carrot, red pepper, lemon peel, crushed red pepper, and tofu mixture.

  3. Boil for a few minutes.

  4. Reduce heat to a low simmer for 8 to 10 minutes.

  5. Cook until veggies are tender and noodles are loose.

  6. Then, stir in watercress until it wilts.

  7. Serve immediately because the noodles will absorb the soup quickly.

Nutrition, whole recipe (rough)

322Calories
13 gProtein
20 gFat
28 gCarbs

Counts 8 of 9 ingredients. The other 1 aren't in our nutrition table and add nothing above, so the real totals are higher.

What these numbers assume: 8 portions
IngredientPortion assumedkcal
Olive Oil1 tbsp (14g)119
Tofu100g firm76
Onion1 medium (110g)44
Miso1 tbsp (18g)34
Carrot1 medium (61g)25
Lemonjuice of 1 lemon (48ml)12
Chili1 tsp (2.7g)8
Watercress1 cup (34g)4
Soupnot in our table0

One typical portion per ingredient; the recipe's quantities are not counted. A rough guide only, not for medical or dietary planning.

Recipe from the Recipes Wiki (Fandom).

Steps grouped into stages for easier reading; the method is the source's own.

Explore the science

The flavor team

The pairs that carry this dish. Each one is judged two ways: how much their aromas overlap, and how often cooks already put them together.

  1. Tofu + misotop 1% of all pairs
    Smell alikestrong
    Cooked together75 recipes

    Shared aroma: acetic acid (sour, vinegar).

  2. Lemon + watercresstop 3% of all pairs
    Smell alikestrong
    Cooked together579 recipes

    Shared aroma: coumarin (sweet, hay).

  3. Pepper + lemontop 3% of all pairs
    Smell alikestrong
    Cooked together27,047 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

  4. Carrot + peppertop 6% of all pairs
    Smell alikestrong
    Cooked together14,555 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

  5. Onion + carrottop 6% of all pairs
    Smell alikemoderate
    Cooked together21,601 recipes

    Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).

Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs

What each ingredient does

Firm tofu
Browns in the hot oil to add golden color and a firm, chewy bite to the soup.
Dried udon noodles
Provide the chewy, starchy body of the soup and soak up broth as they sit.
Miso soup mix
Supplies the savory, salty base flavor that defines the soup.
Carrot
Softens during simmering, adding mild sweetness and color to the broth.
Watercress
Added at the end so it wilts gently, adding fresh, slightly peppery greens.

The step that matters

Serve immediately. Noodles keep absorbing broth as they sit, so the soup thickens and becomes soggy. Serving right after the final simmer keeps the noodles tender and the broth loose.

Swap the soybean

How well each one fits the dish's main ingredients (tofu, onion, miso, carrot, pepper, lemon, watercress):

  1. Sesamefits better
  2. Beansfits better
  3. Cashew nutfits better
  4. Soybeanthe original

Fit is the average pairing score against tofu, onion, miso, carrot, pepper, lemon, watercress. Candidates are from the same food group and used in at least 100 recipes.

“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.

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