Red Lobster Copycat Cheddar Bay Biscuits

Ingredients

• 2 cups all-purpose flour, (spooned into measuring cup and leveled-off)
• 3 tablespoons cornstarch
• 2 teaspoons baking powder
• ½ teaspoon baking soda
• 1 teaspoon salt
• ½ teaspoon garlic powder
• ½ cup (1 stick) cold unsalted butter, (cut into ½-inch chunks)
• 1 cup thickly shredded Cheddar cheese
• 1 cup buttermilk (see note)
• 3 tablespoons unsalted butter (melted)
• ¼ teaspoon garlic powder
• 1 tablespoon finely chopped fresh parsley