Is there a 'right' side of aluminum foil to cook with? Here’s the answer

Aluminum foil is a common kitchen item that serves various purposes, from wrapping leftovers to covering pans. It comes in two sides – one shiny and the other dull. However, the debate over which side should be used when cooking has been ongoing.

The shiny side is created due to the process of manufacturing, where two layers of aluminum pass through rollers at the same time. This results in a thin sheet with a shiny finish on the side that touches the roller and a dull side that presses against another layer. The shiny side is exposed to heat during this process, giving it a reflective surface.

Despite the shiny side being more reflective, this difference is so slight that it doesn't significantly impact cooking results. In fact, some brands mention on their packaging that the foil performs equally well regardless of which side is used. So, whether you choose to use the shiny side up or down while cooking is purely a matter of preference and aesthetic choice.

There is one exception to this rule when it comes to non-stick foil, which has a coating applied to the dull side. In such cases, you would want the treated side to be in contact with the food to avoid burning or tearing. But for regular aluminum foil, the decision of which side to use is entirely up to you.