Easy Fish and Tofu Soup

My mom calls fish and tofu soup the soup for the very first days. Traditional Chinese postpartum theory describes the body after birth as “deficient and stagnant” (多虚多瘀): vital energy is drained, but digestion is too weak to handle rich, heavy tonics. There’s a saying for this — xu bu shou bu (虚不受补), “a depleted body cannot absorb aggressive nourishment.” You have to start with the gentlest, most digestible foods and build from there.

This is her answer: a gentle fish tofu soup made with fish fillets and tofu, two of the softest, most delicate ingredients in the Chinese kitchen, simmered slowly in a claypot that locks in their natural sweetness. There’s another saying she loves — “a bowl of soup after birth is worth more than a good prescription.” This is what “food as medicine” (药食同源) means in practice, and it’s why this simple postpartum soup has stayed on the table for generations.

And it really is simple. A lot of Chinese fish soups are gorgeous but fussy — they call for a whole fish, head and all, seared and simmered until the broth turns milky white. This one skips all of that. It uses plain fish fillets, so there’s no whole fish to wrangle, no fish head, no bones to fish out. You give up a little of that ultra-milky depth a whole-fish soup delivers, but what you get instead is tender, silky fish in a clean, savory broth — every bit as nourishing, and easy enough to make in the bleary first weeks with a newborn.

This recipe makes 4 servings.

Why Fish Tofu Soup is a Postpartum Classic

In Eastern postpartum tradition, fish tofu soup is considered one of the most reliable milk-supporting dishes — gentle in nature, replenishing to qi and blood, and (importantly, in traditional thinking) nourishing without being so rich that it contributes to clogged ducts the way heavier tonics like pork trotter soup sometimes can.

From a clinical perspective, the logic holds up well. Breastfeeding mothers need significant additional fluid and protein, and a light, savory soup delivers both in a form that’s easy to eat even with a diminished appetite. White fish and tofu are both complete, easily digestible proteins that ask almost nothing of a postpartum digestive system still recovering from labor, hormonal shifts, and sometimes medication.

In traditional confinement practice, drinking the soup hot enough to bring on a light sweat is considered part of the therapy — the warmth helping the body release retained cold. (Take caution not to eat while scalding hot though!)

An Easy Soup That Uses Fish Fillets — Not a Whole Fish

If you’ve looked up Chinese fish soup before, you’ve probably seen recipes that start with a whole fish, head and bones included, pan-seared and then simmered hard until the broth goes opaque and milky. That milkiness is beautiful, and there’s a place for it — but it’s a project, and it’s not what most people want to take on with a newborn in the house.

This version is deliberately the easy one. You use fish fillets, so:

• No whole fish to clean, scale, or break down. Just fillets, sliced.
• No fish head and no bones to deal with in the pot or pick around in the bowl.
• Less time and less mess — start to finish in about 25 minutes.

The honest trade-off: without the head and bones, the broth won’t turn that signature milky white, and it’ll be a touch lighter in body. But with a well-seasoned broth (more on that below) and the velveted fish, it’s still deeply savory, silky, and nourishing — exactly what these early weeks call for. You can always nudge it toward that fishier, fuller flavor with a few easy additions (see the broth step).

The Science Behind the Ingredients

White Fish — Tilapia or Flounder (比目鱼)
My mom’s version uses flounder, a lean, mild white fish that’s low in mercury and digests quickly and easily — exactly the kind of protein a healing body can actually use in the first weeks. But flounder can be hard to find in a typical American grocery store, so use whatever mild white fish you can get. I used tilapia and it worked beautifully. Any delicate, low-mercury white fish will give you that silky texture, and in traditional confinement cooking these light white fish are prized precisely because they’re so easy on the system.

Tofu (豆腐)
Tofu earns its place here twice over. Nutritionally, it adds plant protein and a meaningful dose of calcium — a nutrient that breastfeeding draws on heavily. In the pot, it does practical work too: the tofu layer at the bottom of the claypot keeps the delicate fish from sticking and scorching, and it soaks up the savory broth as it simmers.

Fresh Ginger (生薑)
Ginger appears in nearly every confinement recipe for a reason. It’s a vasodilator that promotes circulation, helps relieve uterine cramping, and assists in the discharge of lochia. Here it also neutralizes any fishiness in the broth. My mom uses a generous hand with the ginger in this soup — more than you’d use for everyday cooking.

Garlic (蒜)
Briefly sautéed garlic builds the aromatic base of the broth. Garlic contains allicin, an antimicrobial and anti-inflammatory compound, and in TCM it’s considered warming — appropriate for the postpartum period.

White Pepper (白胡椒)
White pepper is the quiet signature of Chinese fish soups. In TCM it’s warming and dispels cold from the middle of the body; in the kitchen, it adds gentle heat without the harshness of chili — important when spicy food may still feel like too much.

Broccoli
My mom’s thrifty addition: diced broccoli stems (or small florets) hold their texture in the broth without watering it down. They add fiber, folate, and vitamin C. Any vegetable that doesn’t release a lot of water works — carrot is her other suggestion. You can try any vegetables you have in your fridge. Mushrooms, bak choy, daikon radish, napa cabbage – these would all work well.

The Secret to Silky Fish: A Cornstarch Coating

If you’ve ever wondered why the fish or chicken in Chinese restaurant dishes is so impossibly tender and smooth — never dry, never rubbery — this is the trick behind it. Before cooking, the fish gets a light coating of egg white, cornstarch, salt, and a splash of wine. The coating forms a thin, protective layer: the egg white and starch seal in moisture, the salt and wine season the fish, and a final drizzle of oil keeps the slices from sticking to each other.

The technique has a name — velveting, which is exactly what it sounds like, because it gives the fish a smooth, velvety texture. (In Chinese it’s 上浆, “applying the coating.”) It’s been used in Chinese kitchens for centuries, and it’s far easier than its restaurant reputation suggests. In this recipe, the coated fish poaches gently right in the hot broth rather than being fried — sometimes called water-velveting — which is about as low-effort as it gets.

Two details make or break it:

Pat the fish completely dry first. This is the step everything else depends on. If the slices are wet, the coating slides right off in the broth and the fish falls apart.

Don’t stir after the fish goes in. Lay the slices gently on top of the tofu, one at a time, and leave them alone.

Do You Need a Claypot?

A claypot (砂锅) holds heat exceptionally well, which is what lets you turn the burner off and finish the fish on residual heat alone. If you don’t have one, a Dutch oven is the best substitute — it has the same heat-retaining quality. A thin stainless pot will work in a pinch, but leave the heat on its lowest setting for the final step instead of turning it off.

Instructions

Prep Time: 15 minutes | Cook Time: 10 minutes | Total Time: 25 minutes | Servings: 4

Step 1: Dry the Fish (2 minutes)

Slice the fish on a bias into thick slices, about ½ cm (¼ inch). Slicing on a bias means at a 45 degree angle, like you would do for sashimi (see photo). Pat every slice thoroughly dry with paper towels. This is the key to a velvet coating that actually stays on — don’t rush it.

Step 2: Coat the Fish (10 minutes)

In a bowl, combine the fish with a pinch of salt, a pinch of white pepper, and 1 tablespoon of Shaoxing wine (or white wine). Using your hand, gently mix in one direction until the fish feels slightly tacky. Add an egg white and 2 tablespoons of cornstarch and mix until each slice is evenly coated. Finally, drizzle in a little neutral oil and toss — this keeps the slices from sticking together in the pot. Set aside to marinate for 10 minutes. (This coating is the velveting step — it’s what keeps the fish silky in the broth.)

Step 3: Build the Aromatic Base (3 minutes)

While the fish marinates, heat a little oil in a wok or skillet. Add the ginger slices, garlic, and the white and light green scallion parts and cook until fragrant. Transfer the aromatics to your claypot, then lay the tofu slices over the bottom in a single layer. The tofu does double duty here — it keeps the fish from sticking to the pot, and it drinks up the broth as it simmers.

Step 4: Build and Season the Broth (5 minutes)

The broth needs to be seasoned before the fish ever goes in. Pour in 4 cups of boiling water and whisk in 1 tablespoon Better Than Bouillon until fully dissolved. (You can also start with chicken broth or fish broth instead of using water and bouillon, or use miso paste. Use whatever seasoning you normally use for soup. This is just a suggestion.) Add the broccoli stems now, if using. Bring to a boil over high heat, then reduce to a gentle simmer for about two minutes to cook the broccoli. Taste and adjust with salt and white pepper — season the broth fully now, since you won’t be stirring once the fish is in.

Want it fishier and fuller? This fillet-based soup is lighter than a whole-fish version, but you can deepen it easily: simmer a piece of kombu or other seaweed, or a few shrimp heads/shells, in the broth for a few minutes, then fish them out before adding the fish.

Step 5: Lay In the Fish (2 minutes)

Turn the heat to its lowest setting — the surface of the broth should barely bubble, not roll. Using chopsticks or tongs, lay the fish slices one at a time across the tofu and the surface of the broth. Do not stir. Stirring is how velveted fish falls apart.

Step 6: Finish on Residual Heat (1-2 minutes)

The moment the edges of the fish slices turn white, cover the claypot and turn off the heat. Let the residual heat of the pot gently finish the fish, 1 to 2 minutes. Uncover, finish with a few drops of sesame oil and the sliced scallion greens, and serve hot.

Recipe

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