Step 1

Preheat the oven to 425ºF and set an oven rack in the middle position. Line a 13x18-inch baking sheet with parchment paper.

Step 2

In a large bowl, whisk together the flour, cornstarch, baking powder, baking soda, salt, and garlic powder. Add the butter and, using a pastry cutter or two knives, cut the butter into the dry ingredients until the mixture resembles coarse sand with a few pea-sized clumps of butter intact. (Alternatively, you can use your fingertips to rub the butter into the mixture.) Add the cheese and buttermilk and stir with a rubber spatula until the dough comes together into a shaggy, sticky mass. If the dough seems dry, add 1 to 2 tablespoons more buttermilk. Do not over-mix.

Step 3

Using two soup spoons, scoop 8 peach-size mounds (about 2½ inches in diameter) of the biscuit dough onto the prepared baking sheet, spacing them evenly apart. Do not compact the mounds or try to make them smooth on top; they are meant to have an irregular shape. Bake for 17 to 20 minutes, until the biscuits are lightly golden.

Step 4

Make the Topping: In a small bowl, whisk together the melted butter, garlic powder, and parsley. Brush the tops of the biscuits with the butter mixture and serve warm.

Step 5

Freezer-Friendly Instructions: Unbaked biscuits can be stored in the freezer for up to three months. When you're ready to enjoy them, there's no need to thaw—simply bake them a bit longer than usual. If you've already baked some biscuits and have leftovers, let them cool before placing them in the freezer. When ready to enjoy, let thaw at room temperature and then reheat until warm in a 300°F-oven.

Step 6

Note: If you’d like to make your own buttermilk, check out the easy method here.