Fish paste is made by grinding fresh fish flesh with salt until the proteins bind into a smooth, bouncy, gel-like mixture that can be shaped, steamed, fried, or added to soups. The process is straightforward, but a few details about fish selection, salt ratio, and temperature make the difference between a springy, satisfying paste and a mushy one. Here’s how to do it right.
Choose the Right Fish
White-fleshed, lean fish produce the strongest, most elastic paste. Cod, whiting, hake, croaker, and pollock are all excellent choices. Their muscle fibers are rich in a specific type of protein (myofibrillar protein) that dissolves in salt and then re-links into a firm, springy gel when cooked. This is the same science behind commercial surimi, the base for fish balls, fish cakes, and imitation crab.
Fatty fish like mackerel, sardines, and salmon can be used, but the extra fat interferes with gel formation, producing a softer, more fragile paste. If you want that classic bouncy texture, stick with lean white fish. Freshness matters too. Proteins lose their gel-forming ability as fish ages, so start with the freshest fillets you can find.
Prepare and Wash the Fish
Start by removing all skin, bones, and dark bloodline meat from your fillets. Cut the flesh into rough chunks, then mince it with a knife or pulse it briefly in a food processor. You want small, uniform pieces, not a smooth paste yet.
Next comes the step that separates a good fish paste from a great one: cold water washing. Place the minced fish in a bowl of ice-cold water, gently stir for a minute or two, then let the fish settle and pour off the cloudy water. This rinse removes blood, fat, enzymes, and water-soluble proteins that would otherwise weaken the gel and dull the color. Industrial surimi production typically uses three washing cycles, though research has shown that even two cycles significantly improve gel strength. For home cooking, two to three washes with cold water will give you a noticeably cleaner flavor and whiter paste. After the final wash, squeeze out as much water as possible using cheesecloth or a clean kitchen towel.
Why Salt Is the Key Ingredient
Salt does far more than season fish paste. It dissolves the myofibrillar proteins locked inside the muscle fibers, causing them to unfold and link together into a network. Without salt, those proteins simply can’t form a gel. The paste would cook up crumbly instead of bouncy.
The ideal concentration is around 2 to 2.5% of the total paste weight. In practical terms, that’s roughly one teaspoon of fine salt per 200 grams (about 7 ounces) of fish. Research on surimi gels found that this range maximizes breaking force, deformation resistance, and the paste’s ability to hold moisture during cooking. Going much higher than 3% doesn’t improve texture and makes the final product unpleasantly salty.
Grind the Paste: Temperature Is Critical
Once the washed fish is drained, add the salt and begin processing it into a smooth paste. You can use a food processor, a mortar and pestle, or even two cleavers and a cutting board (a traditional technique in many Asian kitchens). The goal is to work the salt thoroughly into the fish until the mixture becomes sticky, cohesive, and slightly glossy.
Here’s the rule that matters most: keep everything below 10°C (50°F) during grinding. Above that temperature, the proteins begin to denature from the friction heat of processing, and once they denature prematurely, they lose their ability to form a gel. That means your paste won’t set properly when cooked. To stay safe, chill your bowl and blade in the freezer beforehand, and if you’re using a food processor, work in short pulses rather than running it continuously. Some cooks add a few ice chips directly into the paste during processing to absorb heat.
You’ll know the paste is ready when it pulls away from the sides of the bowl and clings to your hand when you press it, almost like a thick, tacky dough. This stickiness means the proteins have properly dissolved and are ready to form a gel.
Season and Shape
With the base paste ready, you can add flavorings. Common additions include:
- White pepper for gentle heat
- Sugar (a small pinch) to balance the salt and improve browning
- Sesame oil for aroma
- Egg white for a lighter, smoother texture
- Cornstarch or tapioca starch (1 to 2 tablespoons per 500g of fish) to add chewiness and help bind moisture
Starch serves a similar role at home to what polyphosphates do in commercial production. Manufacturers add polyphosphates to increase water retention, preserve texture during storage, and maintain a consistent weight. Since you’re making paste fresh, a bit of starch and an egg white accomplish much of the same moisture-binding effect without additives.
Shape the paste however you like. Wet your hands with cold water to prevent sticking, then roll it into fish balls, spread it onto tofu skin for stuffed rolls, flatten it into patties for pan-frying, or pipe it into strips for fish noodles. The paste is versatile enough to wrap around sugarcane sticks, stuff into peppers, or simply drop by spoonfuls into simmering broth.
Cooking Methods
How you cook the paste affects the final texture. For the bounciest result, poach fish balls or cakes in water that’s held just below a simmer, around 70 to 80°C (158 to 176°F), for several minutes before briefly raising the heat. This gentle initial cook lets the proteins set gradually into a tighter gel. Dropping fish balls straight into a rolling boil can cause the outside to seize before the inside sets, leading to an uneven texture.
Steaming works well for fish cakes and stuffed items. Steam for 8 to 12 minutes depending on thickness. Deep-frying at 170 to 180°C (340 to 355°F) gives you a golden crust with a springy interior, perfect for fried fish balls. Pan-frying in a little oil is the simplest option for flat patties, about 3 to 4 minutes per side over medium heat.
Storage Guidelines
Raw fish paste is perishable. If you’ve made more than you can cook right away, refrigerate the uncooked paste and use it within one to two days. For longer storage, portion it into balls or patties, arrange them on a parchment-lined tray so they aren’t touching, and freeze. Lean fish paste keeps well frozen for four to six months. Paste made from fattier fish should be used within two to three months, as the fat can go rancid.
Cooked fish paste (already shaped and cooked into fish balls, cakes, or other forms) lasts three to four days in the refrigerator and one to two months in the freezer. Freeze cooked items on a tray first, then transfer to a sealed bag once solid to prevent them from sticking together.
Troubleshooting Common Problems
If your paste is mushy after cooking, the most likely causes are using fish that wasn’t fresh enough, skipping the cold water wash, or letting the paste get too warm during grinding. Temperature control is the single biggest factor in texture quality.
If the paste tastes fishy or looks gray, it probably needs more washing cycles. An extra rinse or two removes the compounds responsible for off-flavors and discoloration. Using filtered or very cold tap water helps.
If the paste won’t hold together when shaped, you may not have ground it long enough for the salt to fully dissolve the proteins. Continue processing (keeping it cold) until the texture becomes noticeably sticky and cohesive. Adding a small amount of egg white can also help if the paste remains loose.