Italian Mandarin Sorbet | Sorbetto al Mandarino

Sep 29

11 min read

Sorbetto al Mandarino (Italian Mandarin Sorbet)

Sorbetto al mandarino is the most fragrant of the Italian citrus sorbets and the easiest one to ruin. Mandarin juice is sweeter and far less acidic than orange or lemon, so on its own it freezes into something soft and vaguely sweet that could be almost any fruit. Everything that makes a mandarin smell like a mandarin sits in the skin, not in the glass, and this recipe is built around getting it out without cooking it.

Yield: 6 servings, about 1 quart (950 ml). Prep: 30 minutes. Steep: 2 hours. Churn: 25 minutes. Harden: 4 hours. Difficulty: intermediate. Course: dolce. Region: Sicily.

The Story

The mandarin reached the Mediterranean late. Citrus reticulata came out of southern China and only arrived in Europe in the early nineteenth century, carried first to Malta and then to Sicily, which means that while the lemon and the bitter orange had been growing around Palermo for close to a thousand years, the mandarin is a newcomer. It took hold anyway. The Conca d'Oro, the plain behind the city, suited it so well that by the end of that century mandarin groves had replaced a good part of the lemon planting there, and the fruit acquired an Italian identity fast enough that most people now assume it was always on the island.

The variety that matters most for a sorbet is the mandarino tardivo di Ciaculli, grown in a handful of small groves on the eastern edge of Palermo and protected today as a Slow Food presidium. It ripens from January into March, months after the ordinary mandarins are finished, and it carries more acidity and a considerably more aromatic skin than the early fruit sold at Christmas. The harvest is small and most of it never leaves Sicily. Where you can get it, it is worth the detour: a sorbet made from tardivo fruit tastes of the peel long before it tastes of sugar.

Sorbet itself is older on the island than the mandarin by centuries. Sicily learned sugar, citrus and cooled drinks from Arab Sicily, and the sharbat that arrived with them became the sorbetto once snow entered the picture. Snow was cut on Etna and in the Madonie through the winter, packed into stone pits called neviere, insulated with ash and fern, then carried down to the coastal towns all summer by men who did nothing else for a living. Frozen citrus was a luxury built entirely on that trade. Serving a citrus sorbet between courses, as Italian kitchens still do, is what survives of it.

Ingredients

Twelve mandarins sounds like a great deal of fruit for six servings, and it is. Eight are peeled for the aromatics and juiced afterwards, and the rest cover the shortfall in juice and supply the shells. Buy them loose rather than in a net so you can smell them first.

For the mandarin peel syrup

Mandarins, preferably tardivo di Ciaculli, 3 lb (1.35 kg), about 12 fruits
Water, 1 1/2 cups (360 ml)
Granulated sugar, 1 cup (200 g)
Glucose syrup or light corn syrup, 2 tbsp (40 g)
Fine sea salt, 1/8 tsp (0.5 g)

For the sorbet base

Fresh mandarin juice, strained, 2 cups (480 ml), from the fruit above
Fresh lemon juice, 3 tbsp (45 ml), plus a little in reserve
Granulated sugar in reserve, up to 2 tbsp (25 g)

For serving

Hollowed mandarin shells, 6, from the largest fruits
Candied mandarin peel, finely julienned, 2 tbsp (20 g)
Small mint or lemon verbena leaves, 6
Flaky sea salt, a few grains per portion

Glucose syrup is the one item worth seeking out, and light corn syrup is an acceptable substitute. Leave it out altogether and the sorbet will still taste right, but it will set noticeably harder.

Preparation

Step 1. Remove the peel in wide strips

Wash and dry the fruit, then take the peel off eight of the mandarins with a swivel peeler, in strips as wide and as thin as you can manage. You want the coloured outer layer only, the flavedo, with no white showing underneath. Hold each strip up to the light and scrape away anything pale with a small paring knife. Keep the peeled fruit covered, since it gets juiced later.

Step 2. Rub half the peel into dry sugar

Put half the strips in a bowl with the full cup of sugar and work the two together with your fingertips for about two minutes, pressing rather than stirring, until the sugar is damp, faintly orange and smells strongly of mandarin. This is an oleo saccharum: the crystals are tearing the oil glands open and the sugar is absorbing what comes out of them. Cover the bowl and leave it one hour at room temperature. Add no liquid yet.

Step 3. Build the syrup and steep the peel cold

Bring the water to a bare simmer in a small saucepan with the glucose and the salt, stirring only until both dissolve, then take it off the heat immediately. Let it fall to just warm, around 100F (38C), and only then stir in the oleo saccharum sugar along with the remaining peel strips. Cover the pan and leave the infusion to steep two hours at room temperature, or refrigerate it overnight for a deeper extraction.

Step 4. Juice the fruit at the last moment

Halve the peeled mandarins and juice them by hand or with a citrus reamer, never in a blender or under a hard mechanical press, both of which drag bitterness out of the membranes and the seeds. Make up any shortfall with the unpeeled fruit. Strain through a fine mesh sieve, pressing lightly on the pulp, and measure out 2 cups (480 ml). Keep the juice cold and covered, since mandarin loses its aroma within the hour.

Step 5. Strain the infusion and correct the balance

Pour the syrup through a fine mesh sieve lined with a single layer of muslin, press the peel gently to release the last of it and discard every scrap of solid. Stir the cold juice and the lemon juice into the strained syrup, then taste. Mandarin varies enormously from tree to tree, so add reserve lemon a teaspoon at a time if it tastes flat, or reserve sugar if the acidity bites. It should taste slightly too sweet now.

Step 6. Chill hard, then churn

Cover the base and refrigerate it until thoroughly cold, at least 4 hours and preferably overnight. A base that goes into the machine above 40F (4C) spends its first minutes simply cooling down instead of freezing, and it comes out coarse. Churn in an ice cream maker for 20 to 25 minutes, until the sorbet holds a soft ribbon off the paddle and looks matte rather than glossy. Stop there: overchurned sorbet goes pale and chalky.

Step 7. Harden and fill the shells

Scrape the sorbet into a shallow metal container, press a sheet of parchment flat onto the surface and freeze 4 hours to firm it. If you are serving in shells, cut a lid from the top third of six reserved mandarins, hollow them with a spoon without piercing the skin, and freeze the empty shells an hour before filling so they do not melt the first spoonful. Pipe the sorbet in and refreeze until service.

Plating

Serve this cold enough to hold an edge and warm enough to smell. Take the container out of the freezer 5 to 8 minutes before you scoop and chill the glasses or the shells at the same time. Use a scoop dipped in hot water and wiped dry between portions, and shape one tall quenelle rather than two small balls: less surface area means slower melting at the table.

Set the sorbet in a chilled coupe glass, or in a frozen mandarin shell steadied on a small cold plate so it cannot roll. Scatter a few threads of candied peel over the top, tuck one small mint or lemon verbena leaf at the base of the quenelle, and finish with three or four grains of flaky salt, which lifts the citrus sharply. Nothing else belongs here: no sauce, no biscuit, no upright sprig of mint.

Professional Technique

The peel of a mandarin is worth more than its juice, and the whole method follows from that one fact. The compounds that make the fruit instantly recognisable sit in oil glands just beneath the surface of the coloured flavedo, and they are volatile and fat soluble rather than water soluble. They will not dissolve into a syrup the way sugar does, and they do not survive heat. Hold peel in boiling water and the water carries the oils off as steam, which is precisely the principle a still works on. What reaches the churn afterwards smells faintly of cooked marmalade instead of fresh fruit, and no amount of extra peel puts the difference back.

There are two ways to take those oils out intact and both are cold. The first is the dry sugar rub, where the crystals abrade the glands mechanically and the sugar then draws the released oil out by osmosis. The second is steeping the strips in syrup already below hand heat. This recipe uses both, and neither goes anywhere near a boil. The white pith is excluded for a different reason: its bitter flavonoids and its limonin dissolve readily into sugar syrup, and unlike the aromatic oils they are made worse by warmth and by time, so every extra minute of contact costs you. That is also why the infusion has to be filtered before churning. Peel left in the base keeps leaching bitterness in the freezer, and the strips themselves seize into hard woody splinters that churning never softens.

Texture and Moisture Control

A sorbet has no fat and no egg to hide behind, so the only things standing between it and a block of flavoured ice are the glucose and the speed of the churn. The glucose is there for body rather than for sweetness: it holds onto water and keeps the frozen mass pliable, which is why a sorbet made with granulated sugar alone scoops hard and shatters under the spoon. Two tablespoons is enough, and much more begins to feel sticky on the tongue.

Aeration is the second control. Twenty to twenty five minutes in a domestic machine brings in enough air to lighten the texture without bleaching the colour out of it. Push past that and you whip in air the sorbet cannot hold, it collapses in the freezer and it sets grainy. Judge it by eye rather than by the clock: matte and ribboning is ready, glossy and still slack is not.

The last variable is surface moisture. Parchment pressed flat onto the sorbet stops the layer of frost that otherwise forms, melts and soaks back into the top inch. Serve from the middle of the container rather than the edges, which always suffer first.

Professional Mise en Place

Almost all of this happens the day before. The only work left on the day is scooping, which is why the freezer, the scoop and the glassware matter here more than the stove does.

Equipment and tools

Swivel vegetable peeler and a small paring knife
Ice cream maker, bowl frozen at least 24 hours
Fine mesh sieve and a square of muslin
Shallow metal container and parchment for hardening
Ice cream scoop, a jug of hot water and a dry cloth

Prepared ahead

Oleo saccharum, made and rested 1 hour
Peel syrup, steeped and strained, up to 2 days ahead, refrigerated
Finished base, refrigerated and churned within 24 hours
Mandarin shells hollowed and frozen, up to 1 week ahead
Candied peel julienned and kept dry in a sealed jar

Service setup

Sorbet moved to the warmest freezer shelf 8 minutes before service
Glasses or shells chilled, plates cold
Hot water and cloth beside the scoop
Garnishes portioned into small bowls within reach

Chef Tips

Buy the fruit by smell. Rub a thumb across the skin of a mandarin in the shop and sniff it. If the perfume is faint there, no technique will put it back in later. Thin skinned fragrant fruit with a little weight to it is what you are after.

Do not zest with a rasp grater for this. A microplane takes flavedo and pith together and produces a paste that clouds the syrup and cannot be filtered out cleanly afterwards. A swivel peeler and a steady hand are the whole trick.

If the base tastes correct at room temperature it is already too weak. Cold blunts both sweetness and aroma, so push the mandarin and the lemon a little further than feels comfortable, then judge the balance again once it has been churned.

Having no ice cream maker is not the end of it. Freeze the base in a shallow tray and break it up with a fork every 30 minutes for about 3 hours. What you get is granita rather than sorbet, which on this island is hardly a demotion.

Common Mistakes

Boiling the peel in the syrup. Heat carries the volatile oils away as steam and leaves a cooked marmalade note in their place. Dissolve the sugar off the heat, let the syrup fall to hand warm and infuse the peel cold.

Taking pith along with the zest. The white layer carries bitter flavonoids that dissolve straight into sugar syrup and grow harsher the longer they sit. Peel thinly, check each strip against the light and scrape off anything pale.

Churning a base that is not properly cold. A warm base wastes the machine's freezing capacity on cooling down and comes out coarse and icy. Refrigerate it to 40F (4C) at least, and overnight when you have the time.

Leaving the peel in the base. An unfiltered infusion keeps extracting bitterness in the freezer and the strips freeze into hard splinters. Strain through muslin and discard every solid before the base goes into the machine.

Juicing with a machine. A hard mechanical press crushes membranes and seeds and pulls their bitterness into the juice. Halve the fruit, use a hand reamer and strain what comes out of it.

Wine Pairing

A citrus sorbet needs a sweet wine with real acidity behind the sugar, poured as cold as the dish itself.

Moscato d'Asti DOCG: The most natural partner on the list and the most forgiving. Low alcohol and a gentle sparkle keep it light enough not to smother a frozen dessert, while the orange blossom and muscat grape aromatics sit on top of the mandarin peel rather than beside it. It is only moderately sweet, so it never competes with the sugar already in the glass.

Moscato di Noto DOC: The Sicilian answer, from the southeast corner of the island. Made from Moscato Bianco and often lightly dried, it is rounder and denser than the Piedmontese version, offering candied orange peel and honey where the other offers flowers. That weight needs a sharp sorbet to lean against, so keep the lemon in the base, pour it well chilled and pour it in a small glass.

Greco di Bianco DOC: A passito from the very toe of Calabria and the cleverest match here. Grapes dried on mats develop dried apricot and a distinct bergamot note, and the bergamot is the link, since it belongs to the same aromatic family as the peel this sorbet is built on. Its acidity stays unusually high for a dried grape wine, which stops it feeling syrupy.

Malvasia delle Lipari DOC: From the Aeolian islands, and the most aromatic of the four. Sun dried Malvasia gives candied citrus, dried fig and a resinous herbal edge, with a saline finish usually credited to the volcanic soil. That salinity is what makes it work here: it answers the flaky salt on the sorbet and keeps the two sweetnesses from piling up.

Storage & Reheating

Sorbet does not improve with keeping, but it holds reasonably well if the air is kept off it. Pack it into a shallow metal container rather than a deep plastic one, press parchment flat onto the surface, close the lid and store it at 0F (minus 18C) for up to 1 week. Beyond that the aroma fades noticeably even though the texture survives, and what you are eating is sweet ice.

There is no reheating here, only tempering. Move the container to the refrigerator for 10 minutes, or to the warmest part of the freezer for 8, never onto the counter, which softens the outside while the centre stays solid. Never refreeze sorbet that has melted past the point of holding a scoop, because the water separates out and refreezes as coarse crystals that no second churn recovers. The strained peel syrup, on the other hand, keeps refrigerated 2 days and freezes well on its own.