01 -
Preheat oven to 350°F and grease or line an 8x8 inch baking pan with parchment paper.
02 -
In a microwave-safe large bowl, melt butter and chopped chocolate in 30-second intervals, whisking until smooth.
03 -
Add granulated sugar to the melted butter and chocolate mixture; blend on medium speed with an electric mixer until combined.
04 -
Beat in eggs one at a time, mixing well after each addition; then stir in vanilla extract, white vinegar, and red gel food coloring.
05 -
Sift together cocoa powder, all-purpose flour, and salt in a separate large bowl.
06 -
Gradually add dry ingredients to the wet mixture, mixing gently until just combined without over-mixing.
07 -
Transfer batter evenly into prepared pan, scraping down the sides with a spatula; bake until a toothpick inserted in the center comes out with a few moist crumbs, approximately 30 to 35 minutes.
08 -
Allow brownies to cool completely in the pan at room temperature before slicing into 16 squares using a sharp knife.