How to Store Chocolate Properly

Short answer: Keep chocolate sealed in a cool, dark, dry place between 16 and 18°C, away from anything strongly scented. Do not put it in the fridge: moving it in and out causes condensation, which dissolves surface sugar and leaves a grey bloom, and cocoa butter absorbs odours from other food. A cupboard away from the oven is almost always better than a refrigerator.

The three things that damage chocolate

Heat is the obvious one. Above roughly 20°C the cocoa butter begins to soften and separate, and when it re-sets it forms pale streaks on the surface — fat bloom.

Moisture is the less obvious one. Water dissolves sugar at the surface; when it evaporates, the sugar recrystallises as a rough grey film — sugar bloom.

Odour is the one people forget. Cocoa butter is fat, and fat absorbs smells. Chocolate stored near coffee, spices or onions will taste of them.

Why not the fridge

A fridge is cold, which sounds right, but it is also humid and full of competing smells. Every time you take the bar out, warm air condenses on the cold surface and starts the sugar-bloom process.

If your home genuinely runs above 22°C and you have no cooler spot, seal the bar in an airtight container, refrigerate, and then let it return to room temperature still sealed before opening. The container is doing the real work.

Is bloomed chocolate ruined

No. Bloom is a cosmetic and textural problem, not a safety one. A bloomed bar is safe to eat, though the snap and melt will be duller.

Bloomed chocolate is still fine for baking, where it gets melted anyway.

Storing brownies

Brownies are different: they are a baked good with moisture in them. Keep them sealed at room temperature for up to five days, or wrap individually and freeze for up to three months.

Refrigerating brownies dries them out faster than freezing does.