HOW TO COOK PERFECT BACON EVERY TIME! COOK BACON IN THE OVEN I'm amazed how many people don't know this. The trick is to put the pan in a cold oven and then switch it on and begin your timer. Cover cookie sheet with tin foil first. Turn oven to 375 for about 20 min instead of 400 for ten because the lower and slower the more fat renders out. Perfect bacon, every time.