Japanese Cold Tofu
Special Soy Dressing (Hiyayakko)

By DishFrames
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A refreshing summer appetizer of chilled silken tofu dressed in a savory umami-rich bonito soy sauce and topped with seaweed and scallions.

↓ The ingredients ↓ The steps

Hiyayakko is a classic Japanese summer comfort dish designed to beat the heat with minimal cooking. It relies on the pristine, velvety texture of chilled silken tofu contrasted with a savory, aromatic dashi-infused soy dressing. Topped with smoky bonito flakes and crisp nori shreds, it offers a clean and delicate flavor profile that refreshes the palate instantly.

Chilled silken tofu blocks garnished with bonito flakes, seaweed shreds, and chopped green onions on a ceramic plate.
Chilled silken tofu blocks garnished with bonito flakes, seaweed shreds, and chopped green onions on a ceramic plate.
Prep5 mins
Cook5 mins
Total10 mins
Yield1 serving
DifficultyEasy
Calories150 kcal

Ingredients

Instructions

  1. 1Boil the water
    Pouring clear water from a glass measuring cup into a pink pot on a portable stove.

    Begin by pouring 60 milliliters of clean water into a small pot on the stove. Turn on the heat and bring the water to a gentle boil to form the base of the sauce.

    Tip: Measuring the water precisely ensures that the sauce has the right concentration and doesnt become too diluted.
  2. 2Add bonito flakes
    A handful of dry bonito flakes being dropped into a pot of boiling water.

    Once the water is boiling, add a small handful of bonito flakes into the pot. This quickly infuses the water with a rich, savory umami flavor.

    Tip: Bonito flakes steep very fast; they only need a brief moment in the boiling water to release their full aroma.
  3. 3Season the sauce
    Pouring dark soy sauce from a golden spoon into the simmering bonito broth in the pink pot.

    Add 3 tablespoons of reduced-salt light soy sauce into the simmering bonito broth. Stir gently to combine the ingredients into a fragrant, savory dressing.

    Tip: Using reduced-salt soy sauce keeps the dressing light and refreshing, perfectly complementing the delicate flavor of the tofu.
  4. 4Stir the sauce mixture
    A close-up shot of a golden metal spoon stirring a reddish-brown sauce mixture with bonito flakes inside a light-colored pot.

    Stir the water, bonito flakes, and reduced-salt light soy sauce together in the pot using a spoon until the ingredients are fully incorporated and the liquid is evenly mixed.

    Tip: Stir gently to ensure the soy sauce and bonito flavor blend completely before pouring it out.
  5. 5Cool the sauce
    Pouring the warm, seasoned sauce from the pink pot into a clear glass bowl.

    Carefully pour the prepared sauce mixture from the pot into a small glass bowl. Set it aside to cool down completely before using it.

    Tip: Letting the sauce cool is essential; pouring hot sauce over cold tofu would compromise its refreshing texture.
  6. 6Unmold the Tofu
    A pair of gloved hands removing a block of white silken tofu from its plastic container onto a wooden board.

    Carefully take a whole block of white silken tofu out of its packaging and place it onto a wooden cutting board.

    Tip: Handle the delicate silken tofu gently to prevent it from breaking apart prematurely.
  7. 7Slice the Tofu
    A knife slicing through a block of white silken tofu on a wooden cutting board.

    Use a sharp kitchen knife to cut the block of silken tofu into smaller, delicate pieces.

    Tip: Wipe the blade with a clean wet towel between cuts for clean edges.
  8. 8Plate the Tofu
    Gloved hands arranging a piece of cut silken tofu onto a decorative green plate.

    Carefully arrange the cut tofu pieces in neat order onto a patterned green serving plate using gloved hands.

    Tip: Leave a small space between pieces if desired for better sauce coverage.
  9. 9Pour the Sauce
    A wooden spoon pouring dark soy sauce over three rows of silken tofu on a green plate.

    Drizzle the cooled soy sauce mixture evenly over the arranged tofu pieces on the plate using a wooden spoon.

    Tip: Make sure the sauce is fully cooled so it doesnt overly heat the cold tofu.
  10. 10Garnish the Dish
    Chopsticks placing dry bonito flakes and seaweed shreds onto the soy-drizzled tofu.

    Use chopsticks to delicately garnish the tofu pieces with dry bonito flakes and seaweed shreds.

    Tip: Sprinkle the toppings evenly just before serving to keep the bonito flakes moving and textured.

Burn It Off

Walking
~30 minutes at a leisurely pace (~4 km/h).
House Cleaning
~35 minutes of light household chores.
Shopping
~50 minutes of casual retail browsing.

Frequently Asked Questions

Silken tofu is traditional because of its melt-in-your-mouth texture, which contrasts wonderfully with the toppings. Firm tofu will be too dense, but you can use soft tofu as a close alternative.
Briefly heating the water with bonito flakes creates a quick dashi broth that infuses the soy sauce with an authentic umami depth. Letting it cool before pouring prevents warming up the chilled tofu.
To make it vegan, omit the bonito flakes or substitute them with a vegan dashi powder or toasted sesame seeds for an alternative savory note.
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