What is dried longan, and when does freeze-dried sell better?
Dried longan is longan fruit (Dimocarpus longan, also called dragon eye) that has been peeled, deseeded and dried with heat until it turns dark amber, chewy and sticky, at around 15–20% moisture. Freeze-dried longan is the same fruit frozen and dried under vacuum: ivory, round, hollow and crisp, at ≤4% moisture, with nothing added. For anything eaten crisp, seen through a window pouch or sold on a clean label, freeze-dried sells better. For sweet soups and herbal brews that are simmered soft, traditional dried longan is still the right ingredient.
What is dried longan, exactly?
It is the traditional way Asia has kept longan through the year. The fruit is harvested ripe, the shell and seed come off, and the aril (the white flesh) is dried slowly with heat, often over several days. Heat caramelises the natural sugar, so the flesh darkens to amber or brown, shrinks into flat folded pieces and picks up a smoky, deep-caramel taste.
Shoppers in Chinese, Vietnamese and Thai grocery aisles know it as the dark, chewy fruit sold for sweet soups, red date tea and Mid-Autumn desserts. Much of that trade has relied on sulfur fumigation to hold colour and slow spoilage, which is why sulfite recalls on dried longan keep appearing in Singapore, the US and Hong Kong.
Freeze-drying takes the same fruit in a different direction. The aril is frozen solid first, then the ice turns straight to vapour under deep vacuum, so the flesh never cooks. What comes out keeps the shape, the colour and the fresh-peeled aroma of the fruit, and loses only its water.
Fresh, dried or freeze-dried: how do they compare?
They start as the same fruit and end as three different ingredients.
| Fresh longan | Traditional dried longan | Freeze-dried longan | |
|---|---|---|---|
| Water | About 83% | 15–20% | ≤4%, aw ≤0.25 at release |
| Colour | Translucent white | Dark amber to brown | Ivory to light cream, pale beige rim |
| Texture | Juicy, firm | Dense, chewy, sticky | Light, airy, cracks like meringue |
| Taste | Sweet, floral, musky | Smoky, deep caramel, herbal | Fresh-peeled longan: honey-floral, light caramel finish |
| Shape | Round, seed inside | Flattened, folded flesh | Round hollow ball, 18–25 mm |
| Natural sugar per 100 g | Around 12 g | Around 60 g | 70 g, none added |
| Sulfite | None | Often fumigated | <10 mg/kg on every lot COA |
| Keeps | Days at room temperature, a few weeks chilled | Cool, dry storage; mould risk in warm, humid rooms | 12 months at ≤25 °C; 18–24 months at ≤18 °C |
| Ships in | Reefer | Dry container | Standard dry container |
The commercial point sits in the colour row. Most shoppers outside Asia have only met longan as the dark fruit in a herbal shop. A pale, round, crisp ball is a new product to them, and a new product earns its own space on the shelf.
Does dried longan have sugar, and how much?
Yes, and all of it comes from the fruit unless the label says otherwise. Drying removes water, so the same sugar is packed into less weight: fresh longan carries around 12 g of natural sugar per 100 g, traditional dried longan around 60 g, and freeze-dried longan 70 g, because it holds the least water of the three.
Two things matter more for your label than the number itself. First, check the ingredient line: some dried longan sold in bulk is sugar-infused before drying, and that sugar must be declared as added. FruitBuys freeze-dried longan reads “longan” and nothing else, so the panel shows 0 g added sugar. Second, think in servings, not in 100 g: a 30 g handful of freeze-dried longan carries the fruit of about 18–24 fresh longans, one per crisp ball, which is a story worth printing on the pack. The full panel, per 100 g and per serving, is in longan nutrition: calories and sugar, fresh vs dried.
How long does dried longan last compared with freeze-dried?
It depends on how much water is left. Traditional dried longan at 15–20% moisture sits around water activity 0.6, high enough for moulds to grow if a carton sits in a warm, humid warehouse. That is why it is usually kept cool, sold through fast-turning grocery channels, and often fumigated.
Freeze-dried longan leaves the partner facility at water activity ≤0.25, well below the 0.30 line where nothing can grow, sealed in a foil barrier bag with silica gel. In the original bag it keeps 12 months at ≤25 °C and RH ≤60%, and 18–24 months in cool storage at ≤18 °C and RH ≤50%. For a distributor, that is the difference between selling a seasonal grocery item and holding a year-round SKU without a cold room. Bag, carton and container details are in freeze-dried longan packaging and container loading.
Which format and grade fit which product?
Freeze-dried longan comes in three cuts, and the cut decides both the look and the freight.
| Product | Grade | Why it works |
|---|---|---|
| Retail snack pouch, gift box | Whole balls, 18–25 mm | Shape and colour are the selling point; looks full at low weight |
| Herbal or wellness tea blend | Whole balls or halves | Visible in the blend; opens up in hot water |
| Frozen yogurt, shaved ice, bubble-tea topping | Whole balls | A crisp, white garnish that holds for the time it takes to serve |
| White or milk chocolate bark, enrobed clusters | Halves or pieces | Sit flat in the chocolate; the crunch survives inside the fat |
| Granola, cereal, trail mix | Pieces | Even dosing, lowest cost per kg |
| Drinks, smoothies, ice cream base | Powder | Dissolves cleanly; see below |
Whole balls ship at 7 kg per carton and pieces at 9–10 kg, so pieces put about 30–40% more fruit into the same container. Pay for shape only where the shopper sees it.
Shape also works on the shelf. Each ball is hollow where the seed was, so freeze-dried longan carries 2.2–2.5× the apparent volume of soft-dried fruit. One kilogram holds about 600–800 whole balls, which puts 20–28 balls in a 35 g pouch, and a 35–50 g pouch looks as full as a 100–120 g pouch of chewy dried fruit. For a private-label snack, that is a pack that looks generous, weighs little and carries a modest fruit cost per unit.
Three product ideas to put in front of your R&D team
- White-chocolate longan bark. Halves scattered across white chocolate before it sets. The honey-floral sweetness balances the richness of cocoa butter, and the fruit stays crisp because it sits in fat, not water.
- Frozen yogurt and bubble-tea topping. Whole balls spooned on at the counter. They hold their crunch for 3–5 minutes on a cold, wet base, long enough to serve and eat, and the ivory colour stands out against fruit purées and tapioca pearls.
- Granola and breakfast clusters. Pieces folded in after baking and cooling, so heat never touches them. In a bar, a 10–15% coat of cocoa butter or white chocolate around the pieces keeps them crisp through the shelf life.
Tea is the fourth, and the oldest: two or three whole balls in a cup of hot water soften in 60–90 seconds and release the aroma of fresh longan, the same flavour Asian households steep with red dates and goji. FruitBuys can send whole balls, halves and pieces in one sample shipment so your team can run every concept in the same week.
How do you keep the crunch in dairy, tea and wet products?
Freeze-dried longan is crisp because its water is gone; any product that gives water back will soften it. Decide when you want that to happen:
| Base | What happens | How to handle it |
|---|---|---|
| Hot tea | Softens in 60–90 s, aroma into the cup | Use it on purpose: blend loose, sell the soft fruit as the finish |
| Yogurt, frozen yogurt, shaved ice | Crisp for 3–5 min | Add at the counter or pack as a separate topper |
| Milk tea, smoothies | Softens quickly | Powder in the drink, whole balls as garnish |
| Chocolate, compound coating | Stays crisp | Add to the fat phase or coat the pieces |
| Granola, cereal, trail mix | Stays crisp for the pack’s life | Add after baking and cooling; seal in barrier film |
Longan’s natural sugar draws moisture from humid air, so bulk bags are sized to one production batch: your line opens a bag, empties it into the mix, and the next bag stays sealed until its turn.
When is powder the better choice?
When the fruit should disappear into the product rather than be seen. In milk tea, smoothies, ice cream bases and beverage premixes, freeze-dried longan powder carries the same honey-floral flavour with no pieces to soften or settle. Many brands use both: powder in the drink, a whole ball on top.
Choose your format in one table
| If your product is… | Choose |
|---|---|
| Sold crisp, seen through a window, on a clean label | Freeze-dried longan, whole balls |
| An inclusion where cost per kg and container load matter | Freeze-dried longan, pieces |
| A drink or a smooth base | Freeze-dried longan powder |
| A slow-cooked sweet soup or herbal brew, sold on tradition | Traditional dried longan, dark and soft by design |
If your customers buy dried longan for long-simmered soups, keep the traditional product on that shelf; it was made for the pot. Freeze-dried longan opens the shelves it cannot reach: snack pouches, toppings, chocolate and tea blends, sold without sulfites to declare and without a cold chain. Why a kilogram of freeze-dried longan takes 8–9.5 kg of fresh fruit, and how that shapes a quote, is in how many kilos of fresh longan make 1 kg of freeze-dried longan. The full specification is on the freeze-dried longan product page, and the freeze-dried longan RFQ checklist lists what a firm quote needs.
FAQ
What is dried longan?
Longan fruit, also called dragon eye, peeled, deseeded and heat-dried to a dark, chewy flesh at around 15–20% moisture. It is used in Asian sweet soups, red date tea and desserts, and much of the trade fumigates it with sulfur.
Does dried longan have sugar?
Yes, natural fruit sugar concentrated by drying: around 60 g per 100 g in traditional dried longan and 70 g in freeze-dried longan. FruitBuys freeze-dried longan has no added sugar; check the ingredient line of any dried longan for sugar infusion.
How long can dried longan last?
Traditional dried longan keeps best in cool, dry storage and can mould in warm, humid rooms. Freeze-dried longan in its original foil bag keeps 12 months at ≤25 °C and RH ≤60%, and 18–24 months at ≤18 °C and RH ≤50%.
What is the difference between dried longan and fresh longan?
Fresh longan is about 83% water and keeps for days. Drying removes most of that water: one kilogram of freeze-dried longan takes 8–9.5 kg of whole fresh fruit and ships without refrigeration.
Does freeze-dried longan taste like fresh longan?
Yes. Low-temperature drying keeps the honey-sweet, floral aroma of fresh-peeled fruit, with a light caramel finish. Heat-dried longan tastes smoky and deeply caramelised.
Is freeze-dried longan sulfured?
No. Every lot COA carries a sulfite result below 10 mg/kg, so the pack can read “unsulfured” with nothing to declare.
Will it stay crisp in yogurt or tea?
On yogurt or frozen yogurt for about 3–5 minutes; in hot tea it softens in 60–90 seconds and releases its aroma. Add it at serving or pack it as a separate topper.
Which grade is cheapest to ship?
Pieces. At 9–10 kg per carton they put about 30–40% more fruit into a container than whole balls at 7 kg.
When should I still use traditional dried longan?
In sweet soups and herbal brews that simmer for a long time, where the fruit is meant to end up soft and dark.
