Anyone else’s toddler obsessed with plain butter?

I’ve noticed about a week ago when I gave my toddler some buttered bread that he was only eating the butter and leaving the bread. He then kept asking me to me top up the butter and just kept eating it off the bread. It’s now turned into a full blown obsession. If he sees the block of butter out he asks for it like it’s the best treat. Tonight when I was cooking dinner I just kept having to feed him little cubes. He then ignored most of the dinner and just kept asking for more butter 😅 I’m not sure if it’s a growth spurt or what but I do find toddler eating habits fascinating