Forgot to post a follow up. Made the recipe and the cakes turned out great. All three cakes vanished rather quickly. Recipe is definitely a keeper.
Edit to add...
Oh yeah. The honey butter is very rich and a little goes a long ways. On the plus side, it keeps very well in the freezer. Currently have about 4 or 5 in the freezer that have been there for several months. No adverse changes to flavor or texture. Doesn't actually freeze solid so it can be used as soon as you take it out of the freezer without waiting on it to thaw.