1 Go ahead and place the pan in the oven. 2  Cook the bacon for 12-17 minutes. 3  Cooking time depends on the thickness of your bacon, and how long it takes for you oven to come to temperature. 4  Start checking your bacon around 10 minutes to ensure your bacon doesn’t burn.. Place the bacon slices in a single layer either directly on the foil or on a rack Make sure not to overlap slices. 4. Turn the oven on and set to 400 degrees. Do not wait for the oven to preheat. Go ahead and place the pan in the oven.