Korean Tofu Guide Silken vs Firm vs Medium for Jjigae
“Soft tofu” on a Western label doesn’t mean what soondubu means in Korean cooking — here’s the full breakdown of every tofu type, which one each jjigae recipe actually needs, and how to substitute correctly.
What’s the Difference Between Silken, Medium, and Firm Tofu?
The difference comes down to how much water is pressed out during production. Silken tofu is uncurdled and unpressed, with a custard-soft texture that barely holds a shape when cut. Medium tofu retains some tenderness while holding together enough to slice and simmer without disintegrating. Firm tofu is pressed further, holding its shape well even through vigorous cooking. In Korean cooking specifically, soondubu (순두부) — often labelled “soon tofu” or “soft tofu” on Western packaging — is an especially silky, uncurdled style, softer than most Japanese silken tofu, and it’s the specific ingredient soondubu jjigae is named after. Most other kimchi jjigae recipes call for medium or firm tofu instead, which is where a lot of the confusion at the grocery store comes from.
Silken vs Medium vs Firm Tofu
Same soybean base, different amounts of pressed-out water — and a genuinely different result in a bowl of stew.
| Type | Texture | Holds Shape? | Used In (this silo) |
|---|---|---|---|
| Silken / Soondubu (순두부) | Custard-soft, uncurdled | No — falls apart if stirred | Soondubu Jjigae specifically |
| Medium ⭐ | Tender but holds a slice | Yes, gently | Most kimchi jjigae recipes on this site |
| Firm | Dense, holds shape well | Yes, firmly | Also works in any jjigae recipe if you prefer more bite |
What Is Soondubu (Soon Tofu)?
Soondubu isn’t just “extra soft tofu” — it’s a distinct production style, uncurdled and unpressed, that never sets into a firm block at all.
Standard tofu production curdles soy milk with a coagulant, then presses the curds into blocks of varying firmness. Soondubu skips the pressing step almost entirely — the coagulated soy milk is left to set into a soft, custard-like consistency and typically packaged directly in that state, often in a soft tube rather than a rigid tub. This gives it a texture closer to a savoury custard than anything resembling a sliceable block.
It’s easy to confuse with Japanese silken tofu, and the two are closely related, but soondubu is often even softer and is specifically the namesake ingredient in soondubu jjigae (순두부찌개) — a distinct dish from the other jjigae recipes on this site, built around this exact texture rather than firmer tofu cubes.
Key Terms & Semantic Entities
Which Tofu for Which Jjigae Recipe
Five of the six recipes in this silo want the same thing; one wants something completely different.
| Recipe | Tofu Type Needed | Why |
|---|---|---|
| Soondubu Jjigae | Silken / Soondubu specifically | The dish is named after and built entirely around this exact soft texture — no substitute captures it fully |
| Seafood Jjigae | Medium or firm | Needs to hold its shape alongside shellfish through the simmer |
| Chicken Jjigae | Medium or firm | Standard choice, holds up well through the cook time |
| Mackerel Jjigae | Medium or firm | Contrasts nicely with the richer, oilier fish |
| Budae Jjigae | Firm | Holds up best against the bold, busy mix of processed meats and toppings |
| Kimchi Guk | Medium or firm | Same logic as most jjigae — holds shape in the thinner soup |
Buying Guide — Tube vs Tub
Substitutions
Storage
Common Mistakes
Nutrition by Firmness
Firmer tofu is more calorie- and protein-dense simply because it contains less water per gram.
| Type | Calories (100g) | Protein (100g) | Fat (100g) |
|---|---|---|---|
| Silken / Soondubu | ~55 | ~5g | ~3g |
| Medium | ~70 | ~8g | ~4g |
| Firm | ~90 | ~10g | ~5g |
Figures are approximate averages and vary by brand and coagulant used.
Sources & Further Reading
Korean Tofu FAQ — 10 Questions
They differ in how much water is pressed out during production. Silken tofu is uncurdled/unpressed and custard-soft; medium retains some structure while staying tender; firm is pressed further and holds its shape well when cut and cooked.
Soondubu (순두부), often labelled “soon tofu” or “soft tofu” in Western stores, is an extra-soft, uncurdled Korean tofu style, similar to but often softer than Japanese silken tofu — the namesake ingredient in soondubu jjigae.
Yes, in most cases regular silken tofu works as a substitute for soondubu, though authentic soondubu (often sold in a tube format) has an even softer, creamier texture.
Medium or firm tofu is standard for most kimchi jjigae recipes, since it holds its shape through simmering. Soondubu (silken) is specific to soondubu jjigae, a distinct dish.
Usually because silken or soft tofu was used where medium or firm was called for, or because the tofu was stirred too vigorously or added too early in a long simmer.
Submerge unused tofu in fresh water in a sealed container and refrigerate, changing the water daily; it typically keeps this way for 3-5 days.
Yes, though freezing changes its texture to something spongier and chewier — this is sometimes done deliberately for certain dishes, but isn’t recommended for jjigae, where tender texture matters.
Soondubu is often sold in a soft plastic tube (squeezed out to serve), while other tofu types are typically sold in a firmer plastic tub filled with water — the packaging itself is a reliable clue to texture.
Yes — tofu is a complete plant protein, and firmer varieties contain more protein by weight than silken tofu due to their lower water content.
No — unlike pan-frying or baking tofu, jjigae recipes simply slice and simmer tofu directly, so pressing beforehand isn’t necessary.
Questions & Comments
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