I’d never heard of rowies until they came up for discussion on RadMac not so long ago and I’ve still never had one but they do sound like a good choice for burgers.
A perfect burger bun should be made with a dough enriched with plenty of butter but they also need to be a bit chewy. That’s pretty much how I imagine a rowie to be. Is that right?
No.
They are very fatty and salty. Not suitable for burgers.
They are sometimes called 'Death Disks'.
My personal theory is that some Hairy Highlander went France to fight against the English in the Auld Alliance, and came across croissants.
He took some as waybread for the journey home, added half a kilo of salt to preserve them, and sat on them somewhere along the way.
On arriving home, he showed them to his wife, who made a stab at replicating the thing.
And so the rowie was born.
A random google throws up this, the photos are accurate. Can't vouch for the recipe; I've never made the things.
https://www.scottishrecipes.co.uk/butteries.php