Wash peppers. Adjust rack to center of oven and turn broiler to 450°F. Place peppers on a baking sheet and broil for 5 minutes. Flip peppers and return to broiler for 5 minutes. Pepper skin should be charred and peeling.
Remove peppers from oven and place in a bowl covered with plastic wrap. Allow peppers to sit and steam for 10 minutes. A paper bag may also be used for this step.
After 10 minutes, carefully remove the cover from the bowl. Gently remove the skin from the chiles. Seeds and stem should also be removed. Now the peppers are roasted and ready to be stored or used in your recipe.