01 -
Preheat the oven to 350°F and line an 8x8-inch square baking pan with parchment paper.
02 -
In a large microwave-safe bowl, melt the unsalted butter and chopped semi-sweet chocolate in the microwave using 30-second intervals, stirring until smooth.
03 -
Whisk in granulated sugar until incorporated, followed by eggs added one at a time, mixing thoroughly after each addition. Stir in vanilla extract, white vinegar, and red gel food coloring.
04 -
In a separate medium bowl, sift together unsweetened cocoa powder, all-purpose flour, and salt.
05 -
Gradually fold the dry mixture into the wet mixture using a spatula until just combined. Fold in white chocolate chips if desired.
06 -
Spread the batter evenly into the prepared pan. Bake for 30 to 45 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.
07 -
Allow brownies to cool completely in the pan before slicing. Drizzle with additional melted white chocolate if desired.