This cake. It confounds me. It delights me. I never ever thought I would be in raptures about the joyfulness of a — yes — vegan chocolate cake. I now make this as my chocolate cake of choice for people where dietary restrictions are not an issue, and I don’t even need to explain it’s vegan. No need to offer explanations: you just need to offer the cake. On top of everything else, it’s incredibly simple to make. My version has coconut oil in the cake, and coconut butter in the icing, but of…