from The Century Dictionary and Cyclopedia
- To scorch or toast, as before a fire: as, to birsle one's self or one's shanks before the fire.
- To parch or broil: as, to birsle peas or potatoes.
Sorry, no etymologies found.
It was his Royal Highness who suggested the luxury of butter with the fish, and who made a quite original cake by mixing the brains of a cow with some meal, giving orders to 'birsle the bannock weel, or it would not do at all.'