Grate very cold or frozen butter for the flakiest layers.
Mix and knead as little as possible.
Only add enough buttermilk for the dough to come together; don’t make it too wet.
Bake in a hot cast iron skillet, coated with butter for crisp bottoms and soft interiors.
Brush baked biscuits with melted butter for a little crunch on top without making them soggy.