Actually very easy

Ghee

The beliefGhee is taken for a separate product, made in some way quite unlike butter.

The truthYou melt butter and take out its water and milk solids. What is left is pure fat, and it keeps for months without a fridge.

25 minutes

How to make it

What you need

500 g unsalted butter
Muslin or a fine sieve
A clean glass jar

How the engine read this list (1 lines)

500 g

Unsalted butter

butter

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.

Melt the butter in a heavy pan over low heat. Do not rush it: high heat burns the milk solids before the water has gone.
It will foam and crackle: that sound is the water boiling. Let it run without stirring, and skim the white foam from the surface.
When the noise stops, the water has gone. Now watch the solids at the bottom: take the pan off when they turn pale gold and it smells of hazelnuts.
Rest it five minutes, then strain it through muslin into the jar, leaving the brown solids behind in the pan.
Close the lid once it is cold. Ghee turns opaque and creamy as it cools — that is normal, not spoilage.

Why it works

Butter is roughly 82% fat, 16% water and 2% milk solids — and those last two are what make it spoil and what make it smoke early: the water is a medium for bacteria, and the milk proteins are solids that begin to burn at 150 °C. Making ghee removes both. Heated, the butter first boils off its water, which is the foaming and crackling in the pan; when the noise stops, the water has gone. The milk solids then settle and brown at 120–130 °C, giving a nutty aroma. Strained, what remains is almost pure fat: with water activity near zero it keeps for months at room temperature, and the smoke point rises from 150 °C to 250 °C. Ghee is butter made both more durable and fit for higher heat.

The rough sum

500 grams going in

3585 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 Lactose-free

Storage & shelf life

How long it keeps

Sealed jar, cool and dark: 6–9 months
Fridge: A year or more
Room temperature, opened often: 3 months
Freezer: Unnecessary

Ghee needs no fridge because no water remains for bacteria to work in. The only thing that spoils it is oxidation, and oxidation has three accelerants: light, air and moisture. So keep the jar dark and closed and the spoon dry. One drop of water in the jar builds a bacterial island exactly there, and the area around it moulds. Ghee turning grainy when cold and clear when warm is normal — different triglycerides crystallise at different temperatures.

When to bin it A sharp, solvent-like smell or a bitterness that catches in the throat means it has gone rancid. If you see mould, the whole jar goes: mould means water got in.

History

Where it comes from

Ghee was Anatolia’s answer to a world without refrigeration, and it was seasonal work: the butter collected through summer was melted before winter, packed into crocks and kept somewhere cool for months. In eastern Anatolia and Kars it still follows the same calendar. Ghee in India, smen in North Africa, sade yağ in Anatolia — three geographies giving the same technical answer to the same problem. What they share is not only the method but the reason: stretching a short season of plentiful milk across a whole year.

The knack

Do not bin the browned solids at the bottom. With a pinch of salt they go onto bread — in India they count as a delicacy in their own right.
Do not use salted butter: the salt stays behind, concentrates, and spoils both the taste and the keeping.
The further you brown the solids, the deeper the aroma: pale gold is neutral, dark amber distinctly nutty, and past 140 °C it turns bitter.

Milk and culture