Can You Use Aluminum Foil to Keep Food Warm?

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Estimated reading time: 2 minutes

Think back to how your refrigerator looked the day after a party, or on Boxing Day morning. Chances are, upon opening the door, you were greeted by piles of aluminum foil parcels, each containing tasty morsels from the day before. So this may make you wonder; if foil is good for preserving food for future use, could you also use it to keep food warm after cooking? The answer is yes – and here’s how.

Using Foil to Keep Food Warm

Aluminium is a conductor of heat, meaning that it allows heat to pass through it. However, its shiny surface reflects some of the heat back. This reflectivity is why fast food outlets often use aluminum trays when making home deliveries – there’s more chance of the food still being warm when the food arrives.