Preheat the oven to 350 and line or grease an 8x8 inch baking dish.

In a medium size microwave safe bowl melt the ½ cup butter. Add the 1 cup sugar and whisk until light and foamy for about 30 seconds.

Add the eggs one at a time mixing in between each addition. Add the ½ tbsp vanilla extract, ½ tsp white vinegar, and ½ tbsp red food coloring. Mix to fully combine.

Next you’ll add the dry ingredients by adding in the 1 ½ cups flour, ¼ cup cocoa, ¼ tsp baking soda, and ¼ tsp kosher salt.

Mix with a hand mixer or a spoon by hand until a thick batter forms.

Fold in the chocolate chips reserving some to sprinkle on top.

Pour the batter into the pan and top with extra chocolate chips.

Bake for 28-30 mins or until an inserted toothpick comes out clean. Let cool before removing from the pan and serving.