Which freeze-dried lotus seeds should a bakery buy for lotus paste and mooncake filling?
For paste you mill yourself, buy halves or pieces. For the fastest line with no mill, buy powder. Keep whole kernels for fillings where the customer sees the seed. All three remove the overnight soak: freeze-dried kernels rehydrate in 10–15 minutes in warm water, and powder goes straight into the kettle. For Mid-Autumn 2027 (15 September), confirm your order in May, at the latest early June, so the container lands in July and paste is milled in August.
Freeze-dried lotus seeds are the shelled, cored kernels of Nelumbo nucifera, steam-blanched and freeze-dried to ≤5% moisture and water activity ≤0.30. They are crisp and ready to eat from the bag, and rehydrate in 10–15 minutes in warm water instead of an overnight soak. They are not makhana (fox nut, Euryale ferox), which comes from a different water plant. This guide is written for the filling plant: how each format runs through your line, what spoils a batch, and the date your season depends on.
How does a filling plant turn lotus seeds into paste?
Four steps: hydrate, cook soft, mill, then cook down in the kettle. The format you buy decides how many of those steps your line still runs.
| Step | From heat-dried seeds | From freeze-dried kernels | From freeze-dried powder |
|---|---|---|---|
| 1. Hydrate | Soak 4–8 hours or overnight in tanks | 10–15 minutes in warm water | Whisk into water in the kettle |
| 2. Cook soft | Long simmer; old stock can stay hard | Soft within minutes of simmering | Cooks as the paste heats |
| 3. Mill | Wet mill to a smooth puree | Wet mill; soft kernels mill fast and evenly | No mill |
| 4. Cook down | Kettle with sugar and oil until the paste holds its shape | Same | Same |
The cook-down is where your recipe lives, and it does not change. What changes is everything before it. The overnight soak ties up tanks and floor space, needs a night shift or a day’s delay, and in a warm plant a long soak starts to sour. Old heat-dried stock adds a second problem: kernels that stay hard after long cooking leave grit in the paste or force a longer cook. Steam-blanched freeze-dried kernels soften evenly, so the mill sees a uniform batch and the paste comes out smooth.
For a plant running Mid-Autumn volumes, that is a day taken out of every batch cycle, in the weeks when the line has none to spare.
Halves, pieces or powder: which one for which paste?
| Format | Best for | What your line still does | Net per carton | Freight per kg (example) |
|---|---|---|---|---|
| Whole kernels (12–16 mm) | Visible-kernel fillings, kernels set into paste | Rehydrate, cook in syrup | 7–10 kg, lower end | about USD 0.52 |
| Halves | Paste you mill to your own texture | Rehydrate, cook, mill | Top of 7–10 kg | about USD 0.36 |
| Pieces | Paste, fillings with small bits of seed | Rehydrate, cook, mill | Top of 7–10 kg | about USD 0.36 |
| Powder (80–100 mesh, 100% lotus seed) | Smooth paste, fastest line, plants with no wet mill | Disperse, cook down | 10 kg | about USD 0.36 |
Freight per kg uses the same example as our container guide, USD 2,000 per 20ft, for comparison only and not a quote: whole kernels fill a 20ft at about 3,850 kg, halves, pieces and powder at about 5,500 kg. Put your own forwarder’s rate in the same line.
How to read the table:
- Halves are the paste plant’s default. They rehydrate and mill exactly like whole kernels, so your mill, your recipe and your texture stay the same, and the container carries more seed. The whole kernel’s shape is disappearing in the mill anyway.
- Pieces suit the same paste, and a filling where a few small bits of seed add bite.
- Powder is the shortest line: no soak, no cook-soft step, no wet mill to run, clean and lose paste on. Disperse it into water before heating so it does not lump, then cook down as usual. It is the whole seed, not a starch, so it thickens to a creamy, opaque paste. If your product needs a clear, gel-like set, that is a starch’s job.
If your recipe is tuned to your own mill and your customers know the texture, start with halves; if you want the fastest line or have no wet mill, run powder. A plant can run both: powder for the smooth white paste, halves for the house paste with more body. Both can travel in one container, each on its own line of the packing list. The full powder specification is on the freeze-dried lotus seed powder page.
Will the paste taste different from one made with heat-dried seeds? It is the same seed, and the flavour is the same mild, nutty, chestnut-like note. Two things you may see are both in the paste’s favour: a cream-coloured paste from ivory kernels processed without sulfites or bleaching, and a smoother mill from kernels that soften evenly. The honest test is a side-by-side batch: your recipe, your kettle, one batch from your current seeds and one from freeze-dried halves or powder, compared for colour, texture, set and taste. White lotus paste keeps its pale colour from a gentler cook; golden lotus paste takes its colour from the sugar caramelising in a longer cook. Either way, the colour comes from your kettle, not from bleached seeds.
Why can one plumule spoil a batch?
Because the green plumule at the heart of the seed is bitter, and once it is milled into paste it cannot be picked out. A whole kernel with its core still in is one bitter bite. The same kernel milled into a 100 kg kettle carries a bitter note through the batch, and a mooncake line finds out at tasting, after the sugar, oil and kettle time are spent.
That is why the specification sets ≥99% coreless, and why the check belongs at goods-in, not at the kettle:
- Count 100 kernels from the sample and again from the arriving container. No more than one may carry a plumule. The small hole at the end of each kernel is the coring mark.
- For halves and pieces, open the split faces: the cavity should be clean.
- For powder, the check happens before milling. The powder is milled only from cored kernels, so taste a cooked trial batch of paste from the pre-shipment sample before you approve the container.
The other arrival checks, from water activity to the 15-minute rehydration test, are in what a freeze-dried lotus seed COA should prove.
What about fillings where the kernel shows?
Buy whole kernels and size them to the cake. Where a whole kernel is set into the paste, sits on a cut face or goes into a lotus-and-yolk filling, the kernel is what the customer sees first.
- Size. The standard grade is 12–16 mm natural sort. For a filling where every cut face should look the same, ask for precision sizing at 12–14 mm or 14–16 mm.
- Shape. Broken kernels are held to ≤3% of the whole-kernel grade. The fine split lines left by coring and drying are normal and are not counted as broken.
- Cooking. Rehydrate for 10–15 minutes in warm water, then cook gently in your syrup until tender. Steam-blanched kernels soften evenly, so the kernel in the cake is soft through rather than hard at the centre.
When should a bakery order for Mid-Autumn 2027?
Confirm the order in May, at the latest early June, so the container lands in July. Work back from the festival:
| When | What happens |
|---|---|
| March–April | Sample in 3–5 working days plus courier; side-by-side trial batch against your current paste |
| By early May | Trial approved; format, size and volume confirmed |
| May, latest early June | Deposit paid; production takes 20–30 days per 20ft |
| June | Pre-shipment sample from the packed lot approved; container stuffed and sails |
| July | Arrival and clearance, 25–35 days after sailing on typical routes; arrival checks on water activity and the 100-kernel count |
| August | Paste milled and fillings made |
| 15 September 2027 | Mid-Autumn Festival |
The transit and clearance range is a planning figure; your forwarder confirms it for your port. The risk in this calendar is a late container, never an early one. A week lost in May is a week less of mooncakes on the shelf in September, while kernels that land early keep 12 months at ≤25 °C and RH ≤60% in their sealed foil bags, in a dry warehouse with no cold chain. If you run Mid-Autumn every year, fix the volume as part of an annual programme, and the festival container becomes one scheduled call-off rather than a race.
How each format fits other product lines, from congee to snack packs, is in which lotus seed format fits your snack, dessert or paste line.
Run your paste with our seeds before you commit the season
Request a sample of halves and powder, or whole kernels if your filling shows the seed, and run them through your own kettle against your current paste. Samples carry no MOQ, and the pre-shipment sample from your packed lot becomes the reference for your container. The full specification is on the freeze-dried lotus seeds product page.
FAQ
What is lotus seed paste made from?
Lotus seeds cooked soft, milled smooth and cooked down with sugar and oil until the paste holds its shape. Freeze-dried kernels or lotus seed powder replace the soaked dried seeds at the start of the process.
How is lotus seed paste made in a filling plant?
Hydrate the seeds, cook them soft, wet-mill them to a puree, then cook the puree down in a kettle with sugar and oil. Freeze-dried kernels cut the hydrate step to 10–15 minutes; powder removes both the soak and the mill.
Do freeze-dried lotus seeds need soaking for paste?
No overnight soak. Kernels rehydrate in 10–15 minutes in warm water; powder is dispersed straight into water in the kettle.
Can I make mooncake paste from lotus seed powder?
Yes. Disperse the powder in water, cook it down with your sugar and oil, and run a trial batch to match your current paste’s texture.
What is the difference between white and golden lotus seed paste?
Mainly the cook. White lotus paste keeps its pale colour from a gentler cook; golden lotus paste takes its colour from sugar caramelising in a longer one. Ivory kernels processed without bleaching suit both.
Why does lotus seed paste taste bitter?
Usually because plumules, the green cores, were milled into the batch. Freeze-dried kernels are ≥99% coreless; count 100 kernels at goods-in and accept no more than one with a plumule.
When should I order lotus seeds for Mid-Autumn 2027?
Confirm in May, at the latest early June, so the container arrives in July and paste is milled in August, ahead of the festival on 15 September 2027.
