How long do briquettes take to heat up?
Let the charcoal or briquettes burn until they're covered with white-gray ash (it takes about 5 to 10 minutes for the coals to get to high heat and 25 to 30 minutes to get to medium heat).
Does charcoal have to be white before cooking?
Charcoal briquets should be coated with white ash before you start cooking. The reason is not for flavor, it is because when coals are white they are at max heat. ... The key to good cooking is temperature control, and if the coals are not white you are not managing the fire, it is managing you.