Lay bacon on a baking sheet, lie it flat if you're planning to use it for something like sandwiches, otherwise crinkle it (see video above) so it's easier to lift off the sheet and you can fit more in one pan. Make sure to use a baking sheet with sides so you don't drip grease all over your oven!
Place bacon into a cold oven and set to 375 degrees.
Bake for about 20 to 30 minutes, checking periodically. (For extra thick cut bacon, it can be as long as 40 minutes).
Pour bacon grease into a mason jar and store in fridge for later.