Is it possible to cook frozen chicken in the sleeve
Although now in some ovens there is a defrost function. Then immediately you shove and already in the oven defrost everything)
The smaller the difference in temperature, the faster and more quickly the chicken will cook
and if you do not care - if only not raw-put in a package in the micro without defrosting - just sprinkle with salt and after 20 minutes you will have an edible chicken. (unlikely my cat will want to try it)
See also the article on WikiHow "How to bake a frozen chicken".