Preheat oven to 475 degrees.
In a mixing bowl, add the self rising flour. Using a cheese grater grate the frozen butter directly into the flour.
Lightly combine with your fingertips being careful not to melt the butter.
Create a well in the center and add the buttermilk.
Mix until it starts to come together. It will look shaggy.
Dump out onto a floured surface and roll out to 3/4" thickness. Fold in half and roll out to a thickness of 3/4" again. Do this 4 more times. You're are creating flaky layers.
Use a biscuit cutter (or recycled vegetable can) and push straight down - do not twist. Place biscuits on a parchment lined sheet pan leaving space between each.
Cook 12-15 minutes. I recomend checking at 12 minutes as all ovens cook different.
Remove from oven.
Brush tops of the buttermilk biscuits with melted butter and serve.
