Step 1

Preheat oven to 350 degrees F.

Step 2

Butter an 8 by 8-inch baking pan, and set aside.

Step 3

For the Brownie layer:

Step 4

Add melted butter to a large bowl and add the sugar, vanilla, cocoa powder, salt, food coloring, and vinegar, in that order, mixing between additions.

Step 5

Whisk the eggs in a small bowl and stir it into the cocoa mix.

Step 6

Fold in the flour until lightly combined.

Step 7

Pour the batter into the prepared baking pan, saving 1/4 cup of the batter for the top.

Step 8

For the Cream cheese layer:

Step 9

Blend together the cream cheese, sugar, egg, and vanilla in a medium bowl.

Step 10

Gently spread the cream cheese layer on top of the brownie batter in the pan.

Step 11

Dollop the remaining brownie batter over the cream cheese layer.

Step 12

Using a skewer or the tip of a knife, drag the tip through the cream cheese mixture to create a swirl pattern.

Step 13

Bake the brownies for 30 minutes.

Step 14

Remove to a cooling rack and allow them to cool completely before cutting.