Which side of the aluminum foil should you use for cooking: the shiny side or the matte side?

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Glossy or matte? The answer is simpler than you might think — and could well put an end to an old debate in the kitchen.

Admit it: you've hesitated in front of your roll of aluminum foil. Shiny side up? Matte side down? We've all heard a different theory, often passed down like a grandmother's secret. Yet, the answer is much simpler than you think… and it might surprise you.

Glossy or matte: is there a real difference?

Look at your aluminum foil: one side is smooth and shiny, the other slightly more matte. Instinctively, we think that one must cook better than the other.

In reality? Not at all.

For conventional oven cooking, both sides function in exactly the same way. They conduct heat identically and do not influence either the temperature or the cooking of the food.

So you can use whichever side you prefer, without fear of ruining your gratin or your fish en papillote.

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