Preheat your oven to 425℉. Line a dark baking tray with parchment paper. Alternatively, you can butter a cast iron skillet. Set it aside.
Place flour, baking powder, salt, both chopped garlic and garlic powder, parsley, chili flakes and sugar in a mixing bowl. Add cold and cubed butter to the bowl. Cut and mix butter into dry ingredients using a pastry cutter/fork. Combine till coarse pea sized crumbs form.
Add in cheddar cheese and add 1 cup of cold buttermilk. Stir it all together till all ingredients combine well. Do not over work the dough. It will appear very crumbly!
Turn the dough to a floured surface and form a rectangle out of the dough. Check out process pictures in the post above for reference.
Now using flatten and fold technique, flatten and fold your dough 3 times in envelop style.
Cut them using a sharp glass/biscuit cutter about 2-3 inches in diameter. Work with scraps till you have 11-12 biscuits and all the dough is used up.
Place on prepared tray/cast iron skillet and brush with remaining buttermilk. Bake for 15-17 minutes or until they appear golden brown on top.
Take them out from oven and brush with melted butter generously. Enjoy warm!