01 -
Line or grease an 8x8 inch baking pan with parchment paper leaving an overhang for easy removal. Preheat oven to 350°F.
02 -
In a microwave-safe bowl, melt butter and chopped chocolate in 30-second intervals, stirring until smooth and glossy. Avoid overheating.
03 -
Whisk sugar into warm chocolate butter mixture until fully blended. Beat in eggs one at a time until thick and velvety. Stir in vanilla, vinegar, and red gel coloring until uniform.
04 -
Sift cocoa powder, flour, and salt together to remove lumps and lighten texture.
05 -
Add dry ingredients gradually to wet mixture, folding gently with a rubber spatula until no flour streaks remain. Avoid overmixing.
06 -
Pour batter into prepared pan, smoothing surface. Bake 25-30 minutes until a toothpick inserted comes out with a few moist crumbs.
07 -
Allow brownies to cool completely in pan. Use parchment to lift slab, then cut into squares with a sharp knife, wiping blade between cuts for clean edges.