Photo: Daniele2399 · CC BY-SA 4.0
Semifreddo (Frozen Hazelnut Mousse with Caramel)
The Italian frozen dessert that is set in a mould instead of churned. Nothing stirs it in the freezer, so every bit of air has to be in before it goes in: half-whipped cream and an Italian meringue made with hot syrup. That is why it needs no machine, and why it is still spoonable frozen.
Ingredients
- egg whites · about 100g; pasteurised if needed3
- sugar150 g
- water45 ml
- double cream · 35% fat or more, cold400 ml
- hazelnut paste · unsweetened, or 120g toasted hazelnuts ground fine100 g
- salt a pinch
- toasted hazelnuts · roughly chopped, to finish50 g
- Caramel sauce
- sugar100 g
- double cream · warmed80 ml
- butter20 g
- salt a pinch
- Chocolate sauce
- dark chocolate · chopped60 g
- double cream60 ml
Steps
- ⏲ 5 min
Line a 1-litre loaf tin with cling film, leaving plenty hanging over the sides. Whip the cream only until soft peaks barely hold and put it in the fridge.
- ⏲ 5 min
Bring the 150g of sugar and the water to 120°C in a small pan. Meanwhile whip the whites to soft peaks.
- ⏲ 9 min
With the mixer running, pour the syrup in a thin stream down the side of the bowl and keep whipping until the bottom of the bowl no longer feels warm. The meringue will be glossy and stiff.
- ⏲ 2 min
Loosen the hazelnut paste and salt with a spoonful of the meringue, then fold that into the rest of the meringue. The flavour goes into the meringue.
- ⏲ 2 min
Fold in the cold cream in two additions, gently enough to keep the bubbles, and stop as soon as the streaks are gone.
Pour into the tin, smooth the top, cover with the cling film and freeze for at least 8 hours, ideally overnight.
- ⏲ 10 min
Caramel sauce: melt the 100g of sugar dry until amber, take it off the heat, pour in the warm cream a little at a time, then stir in the butter and salt. Chocolate sauce: heat the cream, pour it over the chocolate and stir until smooth. Let both cool to room temperature.
- ⏲ 5 min
Turn the semifreddo out, peel off the film and leave it on the counter for 5 minutes. Slice with a knife dipped in hot water and wiped, then drizzle with both sauces and scatter the chopped hazelnuts over.
Variations
- Parfait (French). Made only with pâte à bombe — hot syrup whipped into yolks instead of whites. Richer and yellower.
- With a base and a core. Line the tin with a sheet of sponge or crushed biscuits, or bury nougat or a fruit jelly in the middle.
- Pistachio or coffee. Swap the hazelnut paste for pistachio paste, or fold 40ml of strong espresso into the meringue.
More detail and the reasons why (2)
- Semifreddo on yolks. Plenty of Italian cooks use pâte à bombe in place of the meringue as well, and a few use pastry cream. Pour the same syrup over 4 yolks, whip until cool, and fold in the cream in the same order.
- Biscotto ghiacciato. Italian meringue, half-whipped cream and fruit purée. Use 150g of strawberry or raspberry purée in place of the hazelnut paste, and fold that into the meringue too.
Tips
- Half-whip the cream. The Italian is panna semimontata. Cream whipped stiff turns grainy on the tongue once frozen.
- Flavour into the meringue, never into the cream. Paste or purée stirred straight into whipped cream tends to stiffen it and make it split.
- Cool everything before folding. Warm meringue melts the fat in cold cream and the mixture splits. That is why step 3 keeps whipping until the bowl has cooled.
- About the whites. The hot syrup heats them, but that alone cannot be relied on to make them safe. For pregnant guests or anyone with weak immunity, use pasteurised whites.
More detail and the reasons why (4)
- All the air goes in before the freezer. Gelato is churned as it freezes and takes its air then. A semifreddo freezes still in its mould, so the air already in the cream and the meringue is all it will ever have. Short of air, it sinks as it freezes and turns dense like a mousse.
- Whites first, cream after. A trace of fat stops whites whipping (cooking eggs). Here the fat in the cream only meets the meringue once the foam is built, so the order keeps that rule rather than breaking it.
- Do not cut the sugar. Sugar lowers the freezing point of the water, which is what keeps a frozen dessert spoonable. Cut it and it does not get less sweet so much as harder (what sugar does).
- Five minutes on the counter. Semifreddo is meant to be eaten at around -15°C, and a home freezer runs a few degrees colder. Those minutes close the gap (serving temperature). Leave it longer and the base starts to melt and run, as in the photograph.
The basics behind this dish
- Eggs: Coagulation Temperatures and What They DecideWhite sets at 62°C, yolk at 68°C. Those two numbers explain scrambled eggs, boiled eggs, steamed custard and crème anglaise all at once.
- Why Sauces Split: Emulsions and Pan SaucesA cream sauce breaking and a carbonara scrambling are the same failure. Temperature and emulsifiers — plus how to bring a split sauce back.
- Knife Skills: Grip, Cuts, and Why Size MattersHow you hold the knife matters more than how fast you cut. The pinch grip, the claw hand, and why uniform size is a cooking decision rather than a cosmetic one.
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