Ultimately the scientific reason you should never bake cookies on a foil lined baking sheet is simple.
Baking with aluminum foil on baking sheet.
Place aluminum foil over oven racks another way that you can use aluminum foil to bake cookies is by wrapping the foil around the oven rack skipping the cookie sheet altogether.
Turn the oven on to the temperature specified on the recipe or packaging for the cream cheese poppers.
Place the cream cheese poppers onto the aluminum foil about 1 inch apart.
The parts of your cookie dough that come in direct contact with the foil are exposed to more concentrated heat than the rest of your cookies thanks to aluminum s natural conductor properties.
Tear off a sheet of aluminum foil that s large enough that it will allow for the foil to go up the sides and leave a good sized overhang enough to grab when the baked item is finished.
The foil conducts heat which speeds up the baking process and gives a cookie the crunch y texture it deserves.
Line your oven rack with a triple or even quadruple layer of heavy duty aluminum foil before preheating the oven.
Scoop the dough onto the foil and place the entire rack back into the pre heated oven.
Lining a baking sheet with aluminum foil has benefits that range from perfectly baked goods down to a stress free cleanup.
So you can use the overhang as handles to lift the baked item from the pan with.
Aluminum pans cookie sheet baking pans 15 pack disposable aluminum foil trays reusable and durable nonstick baking sheets 16 inch x 11 inch 4 4 out of 5 stars 319 16 99 16.