Among forest fruits blackberry has the darkest colour and the most intense aroma. Both properties come from the same source.
What is a blackberry botanically?
A blackberry is not a single fruit.
It belongs to the class of aggregate fruits; dozens of small drupelets gathered together.
Each drupelet carries its own skin, flesh and seed.
Twenty to fifty drupelets make up one blackberry.
That structure it shares with raspberry.
But the difference lies here; a raspberry separates from its core when ripe and stays hollow, while in a blackberry the core stays inside and the fruit is solid.
| Measure | Blackberry | Raspberry | Blueberry |
|---|---|---|---|
| Anthocyanins (100 g) | 130-250 mg | 90-150 mg | 300-700 mg |
| Fibre (100 g fresh) | 5.3 g | 6.5 g | 2.4 g |
| Vitamin C (100 g) | 21 mg | 26 mg | 10 mg |
| Sugar (100 g) | 4.9 g | 4.4 g | 10 g |
| Seeds | In every drupelet | In every drupelet | Very small |
| Structure | Solid | Hollow | A single fruit |
Why is the aroma so intense?
The aroma of blackberry comes from two sources.
The first is anthocyanins; the pigments also affect taste and provide a slight astringent note.
The second is volatile aroma compounds; blackberry carries more of those than raspberry.
Because the fruit is solid it also carries more flesh per unit of volume to hold aroma.
A raspberry is hollow; there is less flesh in the same volume.
That difference explains why blackberry registers as more intense when the two get tasted side by side.
What is its antioxidant profile?
Blackberry is known for a high antioxidant content.
Anthocyanins run 130 to 250 milligrams per hundred grams of fresh fruit.
Below blueberry but above raspberry and strawberry.
It contains ellagic acid too; that compound also appears in fruits such as raspberry and pomegranate.
Its fibre is strong as well: 5.3 grams per hundred.
That is among the highest values across fruits, and it comes from the seeds.
What difficulty appears in freeze-drying?
The solid structure of blackberry makes drying harder than raspberry.
Because a raspberry is hollow the vapour leaves easily.
A blackberry carries core tissue at its centre and the route out for vapour runs longer.
The drying time therefore runs longer; where twenty hours suffice for raspberry, blackberry takes twenty-six to thirty.
The junctions between the drupelets also weaken during drying; dried blackberry can separate into drupelets in transit, and that leads to crumbling in the packaging.
Do blackberry seeds cause a problem?
Every drupelet in a blackberry carries a seed.
Twenty to fifty seeds in one fruit.
Those seeds register in the fresh fruit without being unpleasant.
They stand out more in a freeze-dried product; with the water gone the firm texture comes forward.
Some consumers see that as a defect.
But the seeds are a source of fibre; the high fibre value of the product comes directly from them, and removing them is both impossible and unnecessary.
Where does blackberry get used?
Its intense aroma brings the product forward in particular uses.
Over yoghurt and granola; a small quantity suffices.
In smoothie mixtures; its contribution of colour and aroma runs high.
In chocolate fillings; it pairs well with the bitterness of dark chocolate.
In cake and muffin batters; carrying no water it does not loosen them.
Ground to a powder it serves as a natural colouring; a deep purple-red can be achieved without food dye.
What counts as a portion of blackberry?
Freeze-dried blackberry is very light.
A fifteen-gram portion equals around a hundred grams of fresh blackberry.
That is one portion of fruit.
Calories run around fifty.
Fibre runs three grams.
Anthocyanins run 130 to 250 milligrams; that is among the highest quantities obtainable in a single portion.
How does dried blackberry get stored?
An airtight container in a cool, dark place serves.
A desiccant sachet gets used.
It keeps twelve to twenty-four months.
Light is the greatest enemy; anthocyanins break down under it and the deep purple shifts toward brown.
Opaque packaging gets preferred.
The jar does not get opened often; because blackberry is prone to crumbling the drupelets separate at every stir and dust gathers at the bottom of the container.
How does blackberry grow?
Understanding the price and the season of the fruit calls for a look at how it grows.
Blackberry is a shrub; thorny and spreading.
Its wild form occurs naturally in the Black Sea and Marmara regions of Turkey.
Cultivated varieties have been bred thornless, making the harvest easier.
The harvest runs from July to September.
The fruit does not ripen all at once; a field gets walked six or eight times through the season.
Picking happens by hand; a ripe blackberry comes away at a touch and machine harvesting crushes the fruit.
A picker brings in three to five kilograms in an hour.
That intensity of labour explains why fresh blackberry runs expensive and why the freeze-dried form is the only option available through the year.
Which fruits get mixed with blackberry?
Its intense aroma calls for a balancing partner in a mix.
Strawberry suits best; its sweetness cuts the astringency of the blackberry.
Blueberry works too; both are dark and their anthocyanin profiles complete one another.
Used with raspberry the mix stays too acidic.
Neutral fruits such as apple and banana join as a balance, and the blackberry gets set so it does not pass twenty percent.
How does blackberry appear frozen?
Conventionally frozen blackberry sells alongside the freeze-dried form, and the two are different products.
Frozen blackberry keeps its water; it softens on thawing and releases liquid.
That causes no trouble in smoothies and in cooking.
But it does not suit eating directly.
The freeze-dried product carries no water; it stays crisp and can be eaten as it is.
The choice therefore follows the use rather than the price.
