In a large mixing bowl, combine cornmeal, flour, baking powder, and salt. Whisk until evenly blended.

Melt unsalted butter and let cool, then add to dry mixture along with milk. Stir until just combined.

Cover the bowl with a clean towel and let the dough rest for 10 minutes.

On a floured surface, roll or pat dough to 1 inch thick. Cut out biscuits and place on a baking sheet.

Preheat oven to 400°F (200°C), then bake biscuits for 15 to 20 minutes until golden brown.

Remove from oven, let cool for 5 minutes, and serve warm.