The reason you should never bake cookies on an aluminum foil lined baking sheet all boils down to science.
Putting aluminum foil in bottom of baking sheet.
This allows the air to flow unobstructed around the food being cooked above.
Method line your oven rack with a triple or even quadruple layer of heavy duty aluminum foil before preheating the oven.
As you probably already know foil used for cooking is made almost exclusively from the metal aluminum which is a great conductor of heat and useful in many cooking techniques.
3 stack the two sheets of aluminum foil.
Measure out two sheets of aluminum foil that are long enough to cover the width of the bottom oven rack then add 2 inches at each end.
Using aluminum foil as an oven liner can also cause the following issues.
Place the sheet of aluminum foil on the lower level.
For example according to the experts at better homes and gardens a shiny baking sheet is best for shortbread and other items that should not be allowed to brown on the bottom.
A simple sheet of aluminum foil can stop any spill from reaching the heating element of your oven and burning.
Do not use aluminum foil in a microwave.
There are two approaches to using foil.
Is it safe to put aluminum foil in the oven.
Using foil on oven racks can disrupt heat distribution in the oven and interfere with optimal cooking results.
The baking sheet will go on the top.
Firstly let us consider the benefit of us.
While it is safe to bake with aluminum foil i don t recommend putting the foil to line the bottom of your oven.
Food can stick to it however so you may want to coat regular foil with vegetable cooking spray or use a new sheet with each batch.
You will avoid possible heat damage to your oven.
Using high heat with aluminum foil in the oven bottom could cause the foil to melt permanently damaging your appliance.
Notes reynolds makes an aluminum foil lined with parchment paper which gets good reviews but i haven t tried it for more on the safety of using aluminum foil check out articles from real simple the washington post and the national institute of health if you don t want to line pans with foil brushing them with melted butter or spraying them with nonstick spray dusting them with.
If you re using a wide sheet you can repeat step 2 and layer it so that the length in both directions is enough to catch anything that will spill over on either side of the sheet.
Make sure the aluminum foil is directly underneath your pan to guarantee that all spills will be caught.
