Preheat your oven to 350°F and line an 8x8 inch baking pan with parchment paper.

In a large microwave-safe mixing bowl, melt the butter along with the chopped chocolate in 30-second increments. Stir until fully melted and smooth.

Add in the granulated sugar and mix until well combined. Then incorporate the eggs one at a time, beating well after each addition. Stir in the vanilla extract, white vinegar, and red food coloring.

In a separate bowl, sift together the cocoa powder, flour, and salt.

Gradually add the dry ingredients to the wet mixture, mixing until just combined. If desired, fold in white chocolate chips.

Pour the batter into your prepared pan and spread it evenly. Bake for approximately 30–35 minutes or until a toothpick inserted into the center comes out with a few moist crumbs.

Allow the brownies to cool completely in the pan before cutting into squares.

If desired, melt some white chocolate and drizzle it over the cooled brownies before slicing them up.