Your Complete Guide to Cooking with Tofu, Tempeh & Seitan

Tofu, tempeh, and seitan are the three workhorses of plant-based cooking. They are not interchangeable. They are made differently, behave differently in heat, absorb flavor differently, and shine in different dishes. Understanding what each one actually is — at the level of structure and water content — is what separates plant-based cooks who get consistently good results from those who fight their ingredients.

Tofu is curdled soy milk pressed into blocks. Tempeh is whole soybeans fermented and bound by mycelium. Seitan is wheat gluten developed into a chewy protein matrix. Three different processes, three different textures, three different cooking logics. This guide breaks down each one — what it is, how to prepare it, and how to choose between them for any given dish.

What Each Protein Actually Is

The cooking method follows from the structure. Before getting into the technique, here is what each protein looks like at a structural level.

Tofu is made by curdling soy milk with a coagulant — calcium sulfate, magnesium chloride (nigari), or a food-grade acid — and pressing the curds into blocks. The amount of water removed during pressing determines firmness: silken tofu is barely pressed and holds 88–90% water; firm tofu holds around 80%; extra-firm holds 70–75%. The water content dictates everything about how it behaves with heat.

Tempeh is made by inoculating partially cooked soybeans (or other legumes) with Rhizopus oligosporus, a mold whose mycelium grows through the beans and binds them into a firm cake. Fermentation breaks down some of the bean's starches and proteins, reducing bitterness and creating a porous, sponge-like structure that absorbs marinade well.

Seitan is made from vital wheat gluten — the protein extracted when starch is rinsed out of wheat flour. The gluten is hydrated, kneaded, and simmered or steamed until it forms a dense, chewy mass. Its texture comes from gluten development, not water expulsion or fermentation, which is why seitan behaves more like a meat substitute than the other two.

Cooking with Tofu

Tofu is the most versatile of the three because its texture is determined by its water content, which can be removed.

Choose the variety for the dish

1. Silken tofu (88–90% water) — best in soups, sauces, dips, mousses, and dressings. It blends smooth and adds body without flavor.

2. Soft tofu (85% water) — works in mapo tofu, miso soup, and gentle braises where the cubes need to hold shape but stay tender.

3. Firm tofu (80% water) — the everyday choice for stir-fries, scrambles, and sautés.

4. Extra-firm tofu (70–75% water) — best for grilling, pan-frying, baking, and any preparation where a crispy exterior is the goal.

Pressing tofu

Pressing forces out residual water, which lets the surface caramelize and the interior absorb marinade. To press: wrap a block in a clean cloth, place it on a plate, weight it with a heavy pan or a few cans, and leave for 20–40 minutes. Tofu presses are useful for regular cooks, but a stack of cookbooks works equally well.

For a faster approach, freezing and thawing tofu changes its texture entirely — the water expands as it freezes, creating ice crystals that leave behind a chewy, sponge-like matrix once thawed. Frozen-and-thawed tofu absorbs marinade three to four times faster than fresh.

The four core methods

1. Pan-fry — Cube pressed extra-firm tofu, toss in a tablespoon of cornstarch or arrowroot per block (this binds surface moisture and crisps on contact with oil), and fry in a hot pan with neutral oil until golden on all sides. The cornstarch coating produces a crust without deep frying.

2. Bake — Marinate cubed tofu for at least 20 minutes, spread on a parchment-lined tray, and bake at 200°C for 25–30 minutes, flipping halfway. Baking dries the exterior and concentrates flavor.

3. Grill or skewer — Cut extra-firm tofu into thick slabs (1.5 cm), marinate, and grill on a well-oiled surface. Slabs hold up better than cubes on a grill.

4. Blend — Silken tofu blends into creams, dressings, vegan ricottas, and chocolate mousses. The protein structure traps fat and water like dairy cream.

The common mistake

Cooking unpressed firm tofu and expecting it to brown. The water at the surface has to evaporate before browning can begin — Maillard reactions only occur above 140°C, and the water on the surface keeps the surface at 100°C. Press first, then cook.

Cooking with Tempeh

Tempeh's defining feature is its dense, sponge-like fermented structure. It is firmer than tofu, nuttier in flavour, and slightly bitter when raw, which is why almost every tempeh recipe begins with one of two preparation steps.

Steaming or simmering first

Tempeh straight from the package can taste bitter due to compounds produced during fermentation. Steaming or simmering the block for 10 minutes before any further cooking accomplishes two things:

1. Reduces bitterness — soluble bitter compounds leach out into the steaming water

2. Opens the porous structure — the heat softens the mycelium binding and allows marinade to penetrate deeper

This is the single most-skipped step in tempeh cookery. It takes 10 minutes and changes the final dish entirely.

Marinating

Tempeh is at its best after a long marinade. The porous fermented structure soaks up liquid like a sponge. A working baseline marinade:

• 3 tablespoons soy sauce or tamari

• 1 tablespoon maple syrup or rice syrup

• 1 tablespoon rice vinegar or lemon juice

• 1 teaspoon grated ginger

• 1 clove garlic, crushed

• 1 tablespoon neutral oil

Slice the steamed tempeh into thin pieces (5–8 mm), submerge in the marinade, and leave for at least 30 minutes — ideally 2 to 4 hours. Overnight is fine.

The three core methods

1. Pan-fry — Sliced and marinated tempeh fries beautifully in a hot pan with a couple of tablespoons of oil. The exterior crisps; the interior stays soft.

2. Bake — Marinated tempeh slices on a tray at 200°C for 20–25 minutes, flipped once. Excellent for batch cooking.

3. Crumble and brown — Crumbled tempeh sautéed with onion, garlic, and spices makes the base for vegan bolognese, taco filling, or savoury grain bowls. The crumbled texture mimics ground meat.

The common mistake

Skipping the steaming step and wondering why the tempeh tastes bitter or fights the marinade. Fermentation gives tempeh its character, but it also requires a brief reset before cooking.

Cooking with Seitan

Seitan is a meat substitute in both structure and use. The chewy, fibrous texture comes from gluten — the same protein that gives bread its rise — developed into a tight network through hydration and kneading.

Pre-made vs. homemade

Pre-made seitan is sold in many forms: sliced, cubed, sausage-shaped, or as roasts. It is fully cooked and ready to use. Homemade seitan starts from vital wheat gluten flour, which is hydrated, kneaded, and either simmered in seasoned broth or steamed wrapped in foil. Homemade gives more control over texture: a long, gentle simmer produces a chewy, dense block ideal for slicing; steaming produces a denser, drier seitan that browns quickly.

Forget pressing — focus on browning

Unlike tofu, seitan does not need water removal. It is already low in moisture. The technique question with seitan is how to develop a good crust without overcooking the interior, which becomes rubbery when overworked.

The four core methods

1. Sear — Slice seitan into thin pieces or cubes and sear in a hot pan with oil for 2 to 3 minutes per side. The goal is a crisp exterior; the interior is already done.

2. Stir-fry — Cubed seitan absorbs sauce well in stir-fries because the cooked gluten matrix has open pockets. Add it to the pan after the aromatics and vegetables, then finish with sauce.

3. Braise — Larger pieces of seitan benefit from a 20–30 minute simmer in a flavored liquid (tomato sauce, mushroom broth, coconut curry). The gluten structure absorbs the braising liquid and softens.

4. Bake or roast — A seitan roast, brushed with oil and a glaze, can be roasted at 180°C for 30–40 minutes. Best for centrepiece preparations.

The common mistake

Overworking seitan in the pan. Once the gluten has been developed and cooked, repeated agitation and high prolonged heat make it rubbery. Sear or braise — do not stew at high heat for long stretches.

How to Choose Between Tofu, Tempeh, and Seitan

The three are not ranked. Each is the right answer for different dishes.

Dish style	Best choice	Why
Stir-fry, sauté, scramble	Firm or extra-firm tofu	Holds shape, absorbs sauce, crisps fast
Creamy sauces, dressings, mousses	Silken tofu	Blends smooth, adds protein and body
Curries, braises (Asian)	Firm tofu or tempeh	Both hold up to long cook times
Bolognese, taco filling, mince	Crumbled tempeh	Fermented texture mimics ground meat
Sandwiches, wraps, "deli slices"	Seitan	Sliceable, chewy, savoury
Roasts and centrepiece dishes	Seitan	Holds shape; can be carved
Soups and miso	Soft or silken tofu	Tender bite, no chewiness
Salads (warm or cold)	Pan-fried tempeh	Crisp exterior, nutty bite

The decision is about the dish, not the protein. A burger needs structure (seitan or tempeh patty); a chocolate mousse needs body (silken tofu); a Pad Thai needs cubed firmness (extra-firm tofu).

Pairing Flavors with Each Protein

Each protein has a flavor profile that suits certain seasonings.

• Tofu is neutral. It takes on whatever it is paired with — soy and ginger, harissa, miso, smoked paprika, peanut, lemon. Its only requirement is that the seasoning be assertive enough to register.

• Tempeh has a nutty, mushroom-like base that pairs well with deeply savoury flavors — soy, miso, peanut, smoked spice blends, BBQ rubs, Indonesian sambal.

• Seitan has its own savoury depth and works best with seasonings that complement rather than compete — herb-and-garlic roasts, mushroom-based gravies, French and Italian preparations, Mexican spice rubs.

Storage and Shelf Life

Protein	Refrigerator	Freezer
Tofu (opened)	3–5 days, submerged in fresh water, water changed daily	3 months — texture changes when thawed (chewier)
Tempeh (opened)	7–10 days	3 months
Seitan (cooked)	5–7 days in broth or sauce	2–3 months

A note on tofu freezing: this is a culinary tool, not just a storage trick. Frozen-and-thawed firm tofu has a noticeably chewier, more meat-like texture and absorbs marinade significantly faster than fresh tofu. Many home cooks freeze a block specifically before using it for things like vegan butter chicken or General Tso's tofu.

FAQ

Is tofu, tempeh, or seitan the healthiest?

Each has different strengths. Tempeh has the most fiber and easily digested protein because of fermentation. Tofu is lower in calories and a complete protein source. Seitan is highest in protein per gram (about 25g per 100g) but contains gluten and is unsuitable for those avoiding wheat. None of the three is universally "best" — they cover different needs.

Do you need to press tempeh like tofu?

No. Tempeh is already low in water. The preparation step that matters is steaming or simmering for 10 minutes to reduce bitterness and open up the structure for marinade absorption.

Why does tofu sometimes turn out rubbery?

Two common reasons: excess water on the surface preventing browning, or overcooking. Press the tofu first, use a hot pan, and cook to a golden exterior — about 3 to 4 minutes per side for extra-firm cubes. Beyond that, the protein continues to tighten and turn rubbery.

Can seitan be made gluten-free?

No. Seitan is, by definition, wheat gluten. It is the densest concentration of gluten in any food. People avoiding gluten should choose tofu or tempeh — or a soy- or pea-based commercial alternative — instead.

What is the easiest of the three for beginners?

Tofu, specifically extra-firm tofu pressed and cubed. It is widely available, forgiving with seasoning, and quick to cook. Tempeh requires the steaming step; seitan requires understanding gluten development. Tofu is the entry point.

Are these proteins complete?

Tofu and tempeh, both made from soybeans, are complete proteins — meaning they contain all nine essential amino acids in adequate amounts. Seitan is low in lysine and is therefore not a complete protein on its own, though it contributes well to a varied diet that includes legumes and pulses.

Where to Take These Three Next

Once the cooking logic for each protein is understood, the rest is variation. The same pressed tofu cubes that go into a stir-fry can be tossed with cornstarch and baked for a salad topping, or blended (in their silken form) into a chocolate mousse. The same steamed tempeh can be marinated in a Korean glaze for a banh mi or crumbled into a bolognese. Seitan, cubed and seared one night, can be braised in a coconut curry the next.

A plant-based kitchen runs on these three. Each one solves different problems: tofu for body and versatility, tempeh for nutty depth and hearty texture, seitan for chew and centrepiece structure. Choosing well is most of the work. The cooking, after that, is straightforward.

The Vegan School's culinary programme spends a full module on plant proteins — students press, freeze, marinate, ferment, knead, and cook each of the three across multiple cuisines, building the muscle memory that makes any recipe straightforward to execute.