1 Sieve all the dry ingredients into a large mixing bowl.
2 Form a well in the centre, pour the butter and buttermilk in and mix together.
3 Knead for a few minutes until all the ingredients are incorporated, then form into a circle and flatten slightly.
4 Cut a cross on the top of the bread and brush with milk. Bake on a non-stick baking tray at 200C/Gas Mark 6 for about 30 minutes until golden. The bread should sound hollow when you tap the bottom.
5 Why not serve it warm alongside Arbroath pâté