Aluminum foil is a staple in almost every kitchen. People use it for grilling ribs, covering casseroles, or lining pans for roasting.
Despite its everyday presence, many of us rarely stop to question how to use it properly. Does it matter which side faces up?
Is it safe for high heat or for long-term food storage? These are common questions, and the answers might surprise you.
The difference between the shiny and dull sides of aluminum foil has nothing to do with how it performs.
Dr. Abbey Thiel, a food scientist, explains that it all comes down to how the foil is made, writes EatingWell. During manufacturing, two sheets of aluminum are rolled together to make them thin enough without tearing.
The side that touches the rollers becomes shiny, while the other, pressed against another sheet, stays dull. This process affects appearance, not functionality.
When it comes to cooking, both sides of the foil work the same way. Aluminum conducts heat through direct contact, which means the shiny and dull sides perform equally well.
Reynolds, a leading foil manufacturer, confirms that it’s fine to use either side for cooking. While the shiny side reflects a tiny bit more heat, the difference is so small that it doesn’t affect your food.
Different for non-stick foil
For nonstick aluminum foil, it’s a little different. The dull side is coated for nonstick use, so it should face up when you’re cooking.
A simple trick is to check the writing on the foil; if you can read it, you’re using it correctly.
Aluminum foil is incredibly versatile. It’s perfect for wrapping food on the grill, lining pans for easy cleanup, and shielding dishes like casseroles or pies from overbrowning.
It can also be used to retain moisture while cooking or to protect delicate foods like fish from direct heat.
While foil is generally safe, acidic or salty foods can cause small amounts of aluminum to leach into food.
This is not a major concern for most people, but those with certain health conditions, like kidney issues, may want to limit exposure.
In short, aluminum foil is a handy kitchen tool. Whether you use the shiny or dull side, it won’t impact your cooking.
Just be sure to use the correct side for nonstick foil when needed, and enjoy its many uses in the kitchen.
