That's because it's empty. No scaffolding is generated.
>UPDATE. I just looked at my test project and I do see the _Layout.cshtml. I just didn't look for it in the right place.
>However, I did verify that in order for the file _Layout.cshtml to be created the project has to be created using ASP.NET MVC 4 Internet Application. If you choose Empty, nothing is created.
Craig Berntson
MCSD, Microsoft .Net MVP, Grape City Community Influencer