Why Does Chocolate Turn White? Is It Still Safe to Eat?

Have you ever opened a chocolate bar and found that it has turned white or grey on the surface?

It can look like the chocolate has gone bad. But in most cases, that’s not what has happened.

There are two common reasons chocolate can turn white: fat bloom and sugar bloom.

Fat bloom

Fat bloom happens when the fats in chocolate move around and recrystallise on the surface.

This can happen because of temperature fluctuations. For example, a chocolate may be exposed to heat during transportation and then cooled again. This can cause the cocoa butter or other fats to move towards the surface, creating that pale, whitish appearance.

You’ve probably seen this yourself with a bar of chocolate. You open it and suddenly there’s a white layer on top.

It doesn’t look particularly appetising, but the chocolate is generally still safe to eat.

Sugar bloom

Sugar bloom is a little different.

It usually happens when chocolate comes into contact with moisture. Condensation can dissolve some of the sugar on the surface, and when that moisture evaporates, the sugar recrystallises and leaves a rough, whitish coating behind.

Again, it can change the appearance and texture of the chocolate, but it doesn’t automatically mean that the chocolate has spoiled.

So, can you still eat it?

Usually, yes.

Bloom is primarily a quality and appearance issue rather than a food-safety issue. The chocolate may not have the same smooth texture, shine or snap that it originally had, but that doesn’t mean it has become unsafe.

Of course, if chocolate has an unusual smell, visible mould, signs of contamination or has otherwise clearly spoiled, that’s a different situation.

This is also why proper storage matters so much, especially with handmade chocolate.

Chocolate doesn’t particularly enjoy being taken from one temperature to another. Keeping it somewhere cool, dry and away from large temperature fluctuations will help it stay looking and tasting the way it was intended to.

So the next time you open a chocolate bar and see a little white coating on top, don’t panic.

It probably hasn’t gone bad. It has just had a slightly unfortunate relationship with temperature or moisture.