Begin by setting your oven to preheat at 450°F (232°C). Meanwhile, arrange a sheet of parchment paper on your baking tray.
In a large bowl, mix together the all-purpose flour, sugar, baking powder, and salt.
Introduce the chilled, diced butter into the dry ingredients. With your fingertips, incorporate the butter into the flour, aiming for a texture that resembles coarse crumbs.
Carefully incorporate the cold milk, mixing only until the dough pulls together. Avoid overmixing to ensure your Hardee's biscuit remains fluffy.
On a lightly floured surface, gently knead the dough a few times before patting it to about 1 inch in thickness.
Cut out the biscuits with your biscuit cutter or round glass and place them onto the prepared baking sheet.
Bake the biscuits for about 12-15 minutes, or until they achieve a beautiful golden-brown hue. Take the biscuits out of the oven and immediately brush them with melted butter.
Before serving, let the biscuits rest and cool down on a rack for several minutes.