So my sugar cookie recipe is sweet, but not too sweet. It pairs well with Buttercream, but not Royal Icing. So, I am looking for a very sweet cookie that would taste good with Royal Icing. It does not have to be vanilla, any flavor is fine.
I would actually go with a less-sweet cookie if you're icing with royal. Royal is like pure sugar and I think it might be overkill with a really sweet cookie.