AT A GLANCE
- Time: 10 minutes (5 min soak, 5 min assembly)
- Serves: 2 as a side
- Key ingredient: dried wakame (10g = roughly 3 tablespoons)
- Skill level: Absolute beginner
Ingredients
- 10 g dried wakame — roughly 3 tablespoons loosely packed. Expands to about 80–100g once rehydrated.
- 2 tbsp rice vinegar — the mild acidity is essential; see what is rice vinegar for choosing between seasoned and unseasoned.
- 1 tbsp soy sauce — standard koikuchi. Reduce to 2 tsp if using seasoned rice vinegar (which already contains salt).
- 1 tsp sesame oil — toasted, not raw. The dark amber kind. This provides the nutty backbone of the dressing.
- 1 tsp sugar — balances the vinegar. Can substitute honey or mirin (use 2 tsp mirin instead of 1 tsp sugar).
- 1 tbsp white sesame seeds — toast them yourself in a dry pan for 2 minutes if they are not pre-toasted.
- Optional: 1/2 Japanese cucumber — slice paper-thin, salt for 5 minutes, squeeze dry. Adds crunch contrast.
- Optional: 1 tsp grated fresh ginger — brightens the dressing. Use a microplane for fine texture.
Instructions
1. Rehydrate the wakame in cold water
Place 10g of dried wakame in a medium bowl. Cover with plenty of cold water — the seaweed needs room to expand. Set a timer for exactly 5 minutes. Cold water is non-negotiable: hot water breaks down the cell structure too quickly, producing a slimy, limp texture instead of the slight chew you want.
After 5 minutes the wakame should be soft, deep green, and about 8–10 times its original dry volume. If any pieces are still stiff at the center, give them one more minute. Do not soak past 10 minutes total.
2. Drain and squeeze out excess water
Pour the wakame into a fine-mesh strainer. Let it drain for 30 seconds, then gently squeeze handfuls to remove excess water. You want it damp, not dripping. If pieces are larger than bite-size, cut them with kitchen scissors. The stems are edible but chewier — remove them if you prefer a softer texture.
3. Whisk the dressing
In a small bowl, combine 2 tbsp rice vinegar, 1 tbsp soy sauce, 1 tsp sesame oil, and 1 tsp sugar. Whisk until the sugar fully dissolves — about 15 seconds. If adding ginger, stir it in now. Taste the dressing on its own: it should be tart-forward with a salty-sweet finish. Adjust sugar up by 1/2 tsp if your rice vinegar is particularly sharp.
4. Toss, garnish, and serve
Transfer the squeezed wakame to a serving bowl. If using cucumber, add it now. Pour the dressing over and toss with chopsticks or tongs until evenly coated. Sprinkle sesame seeds on top. Serve immediately at room temperature, or refrigerate for 15 minutes if you prefer it chilled.
Cook's Notes
Choosing your wakame
Most dried wakame sold online or at Asian grocers is cut wakame (already in small pieces). Whole-leaf dried wakame needs to be cut after rehydrating. Both work identically in this salad. Look for wakame that is dark green to black when dry, with no white chalky spots (a sign of age). For more on selecting and storing wakame, see How to Use Wakame.
Cucumber technique
If adding cucumber, salt the slices before combining: toss with 1/4 tsp salt, let sit 5 minutes, then squeeze firmly in a clean towel. This removes water that would dilute the dressing. Japanese cucumbers have thinner skins and fewer seeds than English cucumbers — if substituting, remove the seeds from English cucumbers first.
Scaling up for a crowd
This recipe scales linearly. For 6 servings, use 30g dried wakame, triple the dressing, and add a full cucumber. Dress just before serving — wakame releases liquid if it sits in dressing for more than 30 minutes.
Variations worth trying
Add 1/2 tsp chili flakes or a few drops of chili oil for heat. A splash of yuzu juice in place of half the rice vinegar adds citrus complexity. For a heartier dish, toss in edamame or shredded imitation crab. If you want the restaurant-style neon-green color, that comes from a different seaweed blend (hiyashi wakame) and food coloring, not from standard dried wakame.
Where to Go Next
For a deeper look at wakame → What Is Wakame. For other ways to cook with it (miso soup, rice bowls, stir-fry) → How to Use Wakame. Need a substitute? → Wakame Substitute. For the vinegar in this dressing → What Is Rice Vinegar. For the sesame oil → What Is Sesame Oil.
- All Recipes — the full recipe collection
- Miso Soup — the other classic use for wakame
- Yuzu Dressing — an alternative Japanese vinaigrette for this salad
Frequently Asked Questions
- How long do you soak dried wakame for salad?
- 5 minutes in cold water. Wakame expands 8–10x its dry volume, so 10g of dried wakame produces roughly 80–100g rehydrated. Over-soaking past 10 minutes makes it slimy and loses its slight chew. If you accidentally soak too long, a 30-second ice bath can firm it back up slightly.
- Can you use fresh wakame instead of dried?
- Yes. Fresh salted wakame (often sold refrigerated at Japanese grocers) needs a quick rinse under cold water to remove excess salt, then a 2-minute soak. Skip the full 5-minute rehydration. Fresh wakame has a more delicate texture and slightly sweeter ocean flavor than dried.
- Is wakame salad the same as seaweed salad at sushi restaurants?
- Most sushi restaurant seaweed salad uses a mix of wakame and other kelp varieties (often hiyashi wakame or chuka wakame) dressed with sesame oil, rice vinegar, and sometimes chili. This recipe is the classic Japanese version using pure wakame with a clean rice vinegar dressing. The restaurant version is typically sweeter and may include agar-based seaweed for color.
- How long does wakame salad keep in the fridge?
- Dressed wakame salad keeps 2–3 days refrigerated in an airtight container. The texture softens over time as the vinegar continues to work on the seaweed. For meal prep, store the rehydrated wakame and dressing separately and combine just before serving.
- What can I substitute for rice vinegar in wakame salad?
- Apple cider vinegar at a 1:1 ratio is the closest substitute. White wine vinegar works but is sharper — reduce to 1.5 tbsp. Avoid plain white vinegar (too harsh) and balsamic (wrong flavor profile entirely). Yuzu juice mixed with a small amount of vinegar makes an excellent premium substitution.
- Is wakame salad healthy?
- Wakame is one of the most nutrient-dense seaweeds: high in iodine (roughly 80% of daily value per 10g dried), calcium, magnesium, and folate. A single serving of this salad has roughly 45 calories. The main nutritional consideration is sodium — between the soy sauce and the natural salt in wakame, one serving contains about 400mg sodium.
- Can I add other ingredients to wakame salad?
- Cucumber (thinly sliced, salted for 5 minutes, then squeezed dry) is the most traditional addition. Edamame adds protein. Thinly sliced radish or daikon provides crunch. Imitation crab (surimi) makes it a heartier appetizer. Avocado works but add it just before serving to prevent browning.