Blackberry sorbet
Deep purple and properly sharp, with all the raw blackberry out in front. One of the most intense sorbets in the house.
Cooked blackberry turns a winey brown within minutes: its anthocyanins, which are the pigment, break down with heat. That is why only the syrup is pasteurised here and the fruit goes in afterwards.
Ingredients
For 1 kgTick each ingredient as you get it ready.
Need to adjust the formula?
Step by step
9 steps · follow the order for the best result
Chef's notes
- ·The blackberries go in cold: with the syrup already at 4 °C, never on the way up.
- ·Do not skip the cold ageing: it hydrates proteins and stabiliser and clearly improves the texture.
- ·The serving temperature depends on your recipe: if you formulate to a softer PAC than your freezer (say -11 °C with the chest at -18 °C), temper it for 5–10 min before serving; if the PAC matches your freezer, it can be eaten straight out.
- ·Why formulate at -11 and not at -18 °C: even though your freezer sits at -18 °C, formulating at -11 makes the ice cream tastes better — at -18 it is so cold that the taste buds barely pick up the flavour and the fat is slow to melt in the mouth. And keeps better: ice cream formulated at -11 and kept at -18 has less free water, suffers less from Ostwald ripening (ice crystals joining and growing) and keeps its creaminess longer.
- ·Keep your own notes: write down the POD and PAC that work best with your machine.
The texture
spot on
Half a kilo of blackberries per litre: it comes out dark, dense and with the seeds noticeable if you don't sieve. Blackberry acidity is high, so here the sugar works as much for flavour as for texture.
Everything about this blackberry sorbet
A sorbet is water, sugar and fruit, and here the fruit is half the recipe. With no fat to give creaminess, all the body has to come from the solids, held up by the sugars and by inulin, a fibre that adds dry matter without sweetening.
The sugars are split between 38 DE glucose, dextrose and sucrose, and put the serving temperature where it belongs. That split is what avoids the classic home-sorbet fault: the block of ice. The sweetness is kept high on purpose, because blackberry is sharp and cold blunts how sweet things read.
The blackberries go in with the syrup already at 4 °C and are blended thoroughly. From there they go straight to age for 12 to 24 h before churning.
The ingredients and what each does
The fruit brings the flavour, the colour and much of the water in the mix. Sucrose and dextrose set the sweetness and the hardness at serving temperature. Glucose adds body and barely sweetens. Inulin adds solids with almost no sweetness, the job milk would do in an ice cream. The stabiliser holds the free water and stops crystals forming in the freezer. Water adjusts the concentration so the flavour is neither watery nor pasty.
Technique and controlling the numbers
Adjusting the POD (sweetening power) and the PAC (antifreezing power, given as a target temperature) lets you match sweetness and hardness to your taste and your machine. With the selectors in the side bar the formula recalculates itself and you will see how the amount of each ingredient changes.
Storage and common mistakes
Store at -18 °C in an airtight container and avoid freeze-thaw cycles. The commonest faults are not ageing it enough, too much sugar so it never freezes properly, and over-churning, which whips in too much air and wrecks the texture.
Recommended for this recipe
Equipment and ingredients that make the difference.
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