Things Fast Food Employees Will Never Tell You In the largest fast food chains, the most straightforward burger is prepared in just 30 seconds. The reason for this? They’re simply frozen before being taken to the kitchen. 2. Burgers are cooked in an instant. « Previous Page Next Page » Pages: 1 2 3 4 5 6 7 8 9 10 11 12 2017-04-20 news