Actually very easy

Whipped cream

The beliefCream whipped at home is assumed never to rise as high as packet whipped-cream powder, and to collapse quickly.

The truthCream doubles in volume if it is above 30% fat and whipped at 4–7 °C. The secret is cold.

10 minutes

How to make it

What you need

200 ml cream, at least 30% fat, fridge-cold
20 g icing sugar
Half a teaspoon of vanilla extract, optional
A metal bowl and whisk, chilled in the fridge for 15 minutes

How the engine read this list (3 lines)

200 g	Cream, at least 30% fat	cream
20 g	Icing sugar	sugar
1 g	Vanilla extract optional	vanilla

An empty weight means that line could not be turned into grams — either the amount is open ("to taste") or the ingredient has no record here. Neither enters the sum as zero; they do not enter it at all.

Chill the bowl and whisk in the fridge for fifteen minutes. Keep the cream in the fridge until the moment you use it.
Pour the cream into the bowl and whisk at medium speed for a minute, until lines start to show on the surface.
Add the icing sugar and vanilla and keep whisking. When lifting the whisk leaves soft peaks that curl over and drop, it is ready for topping a dessert.
For piping or filling a cake, whisk 15–30 seconds more, until the peaks stand straight. Stop there.

Why it works

What turns cream into foam is not protein but fat. The whisk drives air bubbles into the liquid; in cold cream the fat droplets are partly solid, so they stick to the bubble surfaces, lock onto each other and build a frame around the bubbles. That needs two conditions. The first is fat: below 30% there are not enough droplets to build the frame, and the foam does not hold. The second is temperature: milk fat is largely solid below 10 °C and mostly liquid above 20 °C. In warm cream the fat stays fluid, the droplets merge and the frame collapses. Over-whipping is the far end of the same mechanism: if the droplets keep joining, the frame turns into grains of butter and the water separates. With a mixer, once soft peaks form, stop and look every 15 seconds: the gap between stiff peaks and grain is short.

The rough sum

220 grams going in

757 kcal in total

100% of the mass has figures behind it. This is the sum of what GOES IN rather than of what comes out. Wherever something evaporates, drains or ferments the two differ: a kilo of milk is 150 g of cheese.

Diets it qualifies for

Gluten-free Vegetarian

Storage & shelf life

How long it keeps

Fridge, in a closed box: 1 day, then it starts to weep
Fridge, stabilised with icing sugar and a little mascarpone: 2 days
Freezer, piped onto a tray: 1 month

What spoils whipped cream first is not bacteria but gravity: the liquid between the air bubbles drains down over a few hours and collects at the bottom. Keep it in a sieve over a bowl and the drained liquid parts from it, leaving the top firm for another day.

When to bin it A sour smell or a bitter taste: throw it out. If it has only wept, whisk it for a few seconds again.

History

Where it comes from

The European record of whipped cream goes back to the sixteenth century and to court kitchens in Italy and England, where it was beaten for hours with willow twigs and called “milk snow”. The name “Chantilly” comes from the château of Chantilly north of Paris and is usually linked to its kitchen in the seventeenth century, though the story rests on thin evidence. It came into Turkish as “krem şanti”, and for a while packet powder took the place of real cream.

The knack

If it has gone grainy, fold in two tablespoons of cold liquid cream with a spoon; caught early, it comes back.
Use icing sugar rather than granulated: the starch in icing sugar binds liquid and keeps the foam firm for a few hours longer.
If it is past saving, keep going: you will have butter and buttermilk, and both are useful.

Milk and culture