Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking pan or line it with parchment paper.

In a medium bowl, sift together the all-purpose flour, cocoa powder, baking powder, and salt.

In a separate bowl, whisk together the melted butter and granulated sugar until combined. Add eggs one at a time, along with the vanilla extract, mixing until smooth.

Stir in the buttermilk and red food coloring to achieve the signature hue.

Gradually add the dry ingredient mixture to the wet mixture, stirring gently until smooth. Avoid over-mixing.

Pour the batter into the prepared baking pan and spread it evenly.

Bake in the preheated oven for 20-25 minutes or until a toothpick comes out clean or with moist crumbs.

Allow the brownies to cool in the pan for about 10 minutes before transferring to a wire rack and cutting into squares.