Do you know why the aluminum foil has 2 different sides?

When it comes to cooking with aluminum foil, many people wonder which side—shiny or dull—should face up. The truth is, it doesn’t make much of a difference in terms of cooking performance. However, there are some subtle distinctions:

Shiny Side vs. Dull Side
Shiny Side: The shiny side of aluminum foil reflects heat, which means it is less likely to absorb heat and more likely to reflect it away.
Dull Side: The dull side absorbs heat more efficiently.
What Does This Mean for Cooking?

see continuation on next page