Preheat your oven to 450F. Lightly grease a baking sheet and set aside.
In a large mixing bowl combine flour, salt, baking powder, and baking soda.
Pour the buttermilk into a second bowl. Gently pour the melted butter into the cold buttermilk, stirring as you pour. (The butter should solidify into nice small flakes.)
Pour the buttermilk and butter mixture into the dry ingredients, mixing just until your dough comes together.
Knead the dough gently 5-6 times and then roll it out to ½ inch thick. Cut your biscuits with a 2 ½ inch biscuit (or cookie) cutter. Re-roll any excess dough and continue cutting until all the dough has been used.
Place the cut biscuits onto the greased baking sheet. Bake for 14 - 15 minutes or until lightly golden. Serve warm.
Notes
*Don't have buttermilk? No problem. Place a scant tablespoon of white vinegar in a 1 cup liquid measure. Add milk to ¾ c. Let the mixture stand for 5 minutes before using in the recipe.