- Preheat oven to 450 degrees F. Line a baking sheet with parchment paper. Or you can bake them in a cast-iron skillet. 
- In a large mixing bowl, whisk together flour, baking powder, baking soda, and salt. 
- Stir in the frozen grated butter, making sure all those flakes of butter are coated in flour. 
- Add the shredded cheese and chives, toss to combine. 
- Make a well in the center, add the buttermilk. Stir just until combined. 
- Turn the dough out onto a well-floured surface. Keep a small pile of extra flour on hand to add to your surface or your hands as needed.  
- Flour your hands and bring the dough together, then lightly fold it in half in a gentle kneading motion. Do this about 5-6 times until your dough comes together and is beginning to feel smooth. Pat dough out to about 1 1/2 inch thick. 
- Using a floured cutter, cut the dough into desired sizes. DO NOT twist the cutter. (I use a 3-inch biscuit cutter.) Place the cut biscuits onto the prepared baking sheet, close together but not touching. 
- Brush tops with a little buttermilk. Or you can also brush them with melted butter after baking.  
- Bake for about 12-15 minutes,until they have risen nice and tall and are golden brown on top.