In his show good eats, alton brown often gives presentations about how to cook a variety of foods. for example, in one episode, he talks about how to brine and cook a perfect turkey. what type of informative speech is alton brown giving in each of these episodes?

I believe the answer is: Speeches about process

Speeches about process is a form of informative speech that is conducted by narrating the steps that needed to be taken for a certain things to be created. The purpose of such speech is to help the audiences repeating the process by themselves without direct observation from an expert.