Preheat the oven to 160ºC /325ºF conventional oven. Prepare a 20x20 cm square pan with parchment paper.
Melt the dark chocolate and let it cool slightly while preparing the rest of the ingredients.
75 g dark chocolate chips
In a bowl, sift together the all-purpose flour, cocoa powder, cornstarch, and salt.
95 g all-purpose flour, 15 g cocoa powder, 1 tablespoon cornstarch, ½ teaspoon salt
In a separate large bowl, with an electric hand mixer, whisk together the eggs and granulated sugar, for 2 minutes until light and fluffy.
250 g granulated sugar, 3 large eggs
Add the melted chocolate, vegetable oil, white vinegar, red paste food coloring and vanilla extract into the batter and mix until combined.
110 g oil, 2 teaspoon red paste food coloring, 1 teaspoon white vinegar, 1 ½ teaspoon vanilla extract
Add the dry ingredients to the batter and on medium speed mix it together until combined. Scrape down the sides of the bowl with a spatula to make sure everything has been incorporated.
Pour the brownie batter into the prepared baking pan, smooth it out with the spatula. Bake the brownie in the preheated oven for about 40-45 minutes.
Once baked, let it cool down on a cooling rack. Once cooled down completely, remove the brownie from the pan and place it on a serving dish. Melt the white chocolate and drizzle it over the brownie. Serve once the chocolate has set.
50 g white chocolate