Arrange bacon slices on a cookie sheet. Place them close together but not touching.
Put them in a cold oven. Turn heat to 400 degrees. Walk away.
Come back 20 minutes later and check the progress. Bacon is done when it’s golden brown. If you like it crispy, cook it a little longer, but watch closely. It can turn from crisp to burnt quickly. Thick-cut bacon takes a few minutes longer to cook than traditionally thin bacon.
Remove bacon to serving plate, and pour off the bacon fat to use in later cooking.
I put the bacon directly on my cookie sheet, because I don’t mind washing it. However, if you want to line your cookie sheet with parchment paper for easier cleanup, that’s an option, too!