Preheat oven to 400ºF. Line a rimmed baking pan (half sheet pan) with foil, using a couple layers, so the edges of the pan are covered as well (this prevents the grease from going under the foil). Parchment paper may be used instead if you prefer.
If you prefer, you can place the uncooked bacon on a wire rack, set on the foil-lined rimmed baking sheet. Spray the rack lightly with cooking spray.
Lay bacon on the foil or on the rack, in a single layer, not overlapping slices.
Bake for 15-25 minutes or until it reaches desired crispness. Rotate pan once during cooking so bacon cooks evenly. Keep an eye on it because it goes from not done to burnt pretty quickly.
Using tongs, carefully remove bacon from baking sheet and place on a paper towel lined plate to drain.
Notes
Forget to preheat the oven? Just put the bacon in the cold oven, turn it on, and bake slightly longer than directed.
Using a wire rack will result in flatter bacon strips, with a little less grease.
Thicker cut bacon will require slightly more cooking time.
Using a convection oven: Baking 2 pans of bacon at once in a convection oven takes about 20 minutes.