Question 1

Why does chocolate turn white?

Accepted Answer

The white or greyish film is **bloom**, and it is not mould. There are two distinct kinds, with different causes.

**Fat bloom** is the common one. Cocoa butter can solidify into several different crystal forms, and properly tempered chocolate is set into the one that is stable, glossy and snaps cleanly. If chocolate warms enough for some of the cocoa butter to melt and then re-solidifies uncontrolled, it recrystallises into a less stable form and migrates to the surface. The result is a pale, blotchy, slightly greasy film, and chocolate that feels soft or crumbly rather than snapping.

Warm storage causes it, as does a warm delivery van or a sunny shelf.

**Sugar bloom** looks similar but is caused by moisture. If chocolate is stored somewhere damp, or moved from a cold fridge into a warm room so that condensation forms on it, the surface moisture dissolves some of the sugar. When the water evaporates it leaves sugar recrystallised on the surface as a rough, gritty layer.

Telling them apart: fat bloom feels smooth and greasy and often disappears briefly if you rub it with a warm finger. Sugar bloom feels dry and gritty and does not.

Both are safe to eat. Flavour is largely unchanged, though texture suffers, and bloomed chocolate is perfectly good for baking or melting, where it will be re-tempered or dispersed anyway.

Store chocolate cool, dry, sealed and away from strong smells — around 15–18°C is ideal. The fridge is a common mistake: it is both too cold and too humid, and it is what causes most sugar bloom in home kitchens.

Question 2

What is the difference between dark, milk and white chocolate?

Accepted Answer

The difference is what proportion of the bar is cocoa solids, cocoa butter, milk and sugar. Chocolate begins as cocoa beans, which are fermented, roasted and ground into a paste. That paste separates

Question 3

What does tempering chocolate actually do?

Accepted Answer

It forces cocoa butter to crystallise in one specific form out of six possible ones — and that single structural choice determines whether chocolate snaps, shines, melts at body temperature and

Question 4

What does creaming butter and sugar actually do?

Accepted Answer

It creates the air pockets that make a cake rise — and it is a mechanical process, not a mixing one, which is why the instruction to beat until pale and fluffy is precise rather than decorative. The

Question 5

What actually happens when sugar caramelises?

Accepted Answer

Sugar melts, then breaks apart and recombines into hundreds of new compounds — which is why caramel tastes nothing like sugar and why the process is irreversible. The stages. Heated sucrose melts

Question 6

What is the difference between Dutch-process and natural cocoa?

Accepted Answer

Natural cocoa is acidic. Dutch-process cocoa has been treated with an alkali to neutralise that acidity. The difference changes colour, flavour and — critically for baking — how the cocoa reacts with

Question 7

What is the difference between caster, granulated, icing and demerara sugar?

Accepted Answer

Mostly crystal size, plus whether any molasses remains — and crystal size matters far more in baking than people expect, because it determines how fast sugar dissolves and how much air it can trap.

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