Grate your butter onto a plate. Place that plate in the freezer until you are ready for it. Line a baking sheet with parchment paper and set it aside.
Preheat your oven to 425 degrees. If you have the convection option on your oven, use it.
Mix your buttermilk and egg together.
In a medium-sized bowl add your flour, salt, baking powder, baking soda and mix them together.
Add in the grated butter and mix with a fork or spoon. You want to disperse the butter, but not work it in too much.
Next, mix your buttermilk mixture into the dry ingredients. Just mix it quickly, don't overdo it.
Then add in the grated cheddar, chives, and garlic. Mix it in for a few seconds and turn it out onto your surface. Knead it gently until it all comes together. Next, sprinkle your surface with a little flour and press the dough on this until it is about 1-inch thick.
Cut out your scones, I used a biscuit cutter, but you can also cut them into a triangle shape.
Place them on your baking sheet and move quickly to the freezer for 5 minutes. Then, place in the oven and bake for 15-20 minutes.
Remove from the oven and they are ready to go! You can eat them warm, my favorite way, or you can let them cool.
They are best eaten the day you make them.