Preheat the oven to 450 degrees F.
Mix the self-rising flour and salt in a large bowl. Slowly add the buttermilk, mixing as you go, until all the buttermilk has been added and you have a thick batter. Add the melted butter, garlic and rosemary to a 10-inch square pan. Mix to combine. Pour in the batter and spread with a spatula. Use the spatula to score the batter into 9 squares.
Bake until golden and cooked through, 25 to 30 minutes. (Cover for the last 5 to 10 minutes if they are getting too dark.)
Let sit for 5 minutes, then garnish with the chives and separate into nine biscuits to serve. |