Clarification

What it is

Clarification covers several processes: clarified butter and ghee (removing water and milk solids from butter), consommé (clearing stock with a 'raft' of egg white and minced meat), and filtration methods such as gelatin or agar freeze-thaw clarification for juices and stocks.

Why cooks use it: Clarified butter and ghee can be heated much hotter than whole butter without burning and keep far longer; clarified stocks and juices look clear and taste clean.

The science

Butter is fat, water and milk solids. Heating evaporates the water, and the milk solids separate and either sink or float. For ghee they are cooked until lightly browned, giving its nutty flavour. In consommé, egg white proteins coagulate as they heat and trap fine particles, forming a floating raft.

How proteins set when cookedSmoke point of fatsFats and oilsHydrocolloids: thickeners and gelling agents

Step by step

1. 1

   Ghee: melt unsalted butter in a heavy pan over medium-low heat.

2. 2

   Let it bubble gently as water evaporates; skim the foam from the top.

3. 3

   Continue until bubbling quietens, the liquid is clear and golden, and the solids at the base turn light brown and smell nutty (15–25 minutes).

4. 4

   Strain through a fine sieve or muslin into a clean, dry jar.

5. 5

   Consommé: whisk egg whites with minced lean meat and finely chopped vegetables into cold stock, then heat slowly without stirring once warm; a raft forms and rises.

6. 6

   Make a hole in the raft and simmer gently 45–60 minutes, then ladle the clear liquid through a muslin-lined sieve.

Heat and timing

Time: Clarified butter 10 minutes; ghee 15–25 minutes; consommé 1–1.5 hours.

How you know it’s right

• Ghee: bubbling slows and the noise drops
• Milk solids golden-brown, not black
• Nutty aroma
• Consommé: a firm raft with clear liquid bubbling through the hole