Nope - it's best if you put it on still in the husky coating - it will steam inside before the husk blackens and falls off, and then will crisp up and caramelise. It's best in the husk, but will still cook successfully without it. 5-10 minutes will do it. As a side note, best way I've eaten c-o-t-c is a gloriously unhealthy and fabulously messy Mexican-ish way - boil the cobs in unsalted water, then allow to dry. While still hot, slather in mayonnaise and then roll in some finely grated cheddar or similar, and then sprinkle with hot paprika and lime juice. Eat messily. Wear a napkin, and prepare to have food all over your face as you do so.