This instructor-led intermediate level course helps participants understand how building cookbooks with tests will increase the speed at which participants work by giving out constant feedback throughout the entire cookbook development process. The course covers how to extend cookbooks with custom resources to increase clarity within the recipes and provide resources that are portable to other cookbooks. The course also discusses how Ohai plugins would gather data from the nodes that would aid in more dynamic recipes and extensive reporting. The course equips participants with the skills and knowledge on how to refactor and extend a cookbook through explanation, demonstration, practice and discussion. During the course, participants would create a code repository that could be applied to solve unique challenges faced when managing the infrastructure.