Preheat oven to 450 degrees F.
In a mixing bowl, combine flour, baking soda, baking powder, and salt and mix well.
Using a cheese grater, grate cold butter into the dry ingredients.
Using a fork or pastry cutter, work the butter into the dry ingredients until the butter is well incorporated. It will look crumbly.
Slowly pour the buttermilk into the dry ingredients a little at a time while whisking with a Danish dough whisk or fork. Mix until just incorporated.
Generously flour an area on a flat surface to roll out the biscuit dough.
Scrape the dough out of the mixing bowl and onto the floured surface.
Lightly flour the top of the dough, then fold the dough in half. Gently repeat this process about 4-5 times. (This makes those delicious flaky layers. You do not want to over work the dough; it will cause your biscuits to be hard instead of light and fluffy.)
Gently pat the dough down in a large circle until the dough is about 1/2" - 3/4" thick. (Do not use a rolling pin.)
Using a biscuit cutter, cut out biscuits and place in the bottom of a greased cast iron skillet or baking sheet.
Once all biscuits have been cut out and placed in the skillet or baking sheet, bake for approximately 8-10 minutes until the tops of the biscuits are golden brown.
Remove from heat and let cool.
Enjoy!