Preheat your oven to 400°F (200°C) and line a loaf pan with parchment paper or grease it.

In a large mixing bowl, whisk together all-purpose flour, baking powder, salt, and garlic powder.

In a separate bowl, combine cold butter, buttermilk, and shredded cheddar cheese, mixing until butter resembles pea-sized chunks.

Pour the wet mixture into the bowl of dry ingredients and gently fold until just combined.

Scoop half of the dough into the prepared loaf pan, optionally add reserved cheese and parsley, then top with remaining dough.

Bake for 45 minutes until golden brown, and a toothpick comes out clean when inserted.

Cool in the pan for 10 minutes before transferring to a wire rack to cool completely before slicing.