01 -
Preheat the oven to 175°C. Line an 20x20 cm baking pan with parchment paper.
02 -
In a microwave-safe bowl, melt the butter and semi-sweet chocolate in 30-second intervals, stirring until smooth.
03 -
Add granulated sugar to the melted mixture and stir to combine. Incorporate eggs one at a time, mixing thoroughly after each addition. Stir in vanilla extract, white vinegar, and red food coloring.
04 -
In a separate bowl, sift together cocoa powder, all-purpose flour, and salt.
05 -
Gradually add the dry ingredients into the wet mixture, stirring until just combined to avoid overmixing. Fold in white chocolate chips if using.
06 -
Pour the batter evenly into the prepared pan. Bake for 30 to 35 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.
07 -
Allow the brownies to cool completely in the pan before slicing into 16 squares. Optionally, drizzle melted white chocolate on top and let set before serving.