They should be toasted and buttered, or even better warmed in the oven and buttered. Also a really good bun should look brown, not from the flour, but from the mixed spice, which you don't get in an ordinary teacake.When we were children they only appeared at Easter, and we would have them on Good Friday for breakfast and Easter Sunday at teatime, so would be much more of a treat.
In some ways it's a shame that the anticipation has gone now that they're on sale most of the year.