Buttered scoon

I had coffee and scone and butter at the Tate Modern, St Ives today. No exhibition on so I was able to cut out the middle man and go straight to the shop and cafe.
Liked both. Coffee was good. When I asked for a 'scon' and butter it was confirmed back to me that I did in fact want a 'buttered scoon'. I also bought a notebook (of course)