Prepare the Brownie Batter:

1. Preheat oven to 350°F (175°C). Line an 8×8-inch baking pan with parchment paper and grease lightly.
2. In a mixing bowl, whisk together melted butter, sugar, vanilla extract, and white vinegar until smooth.
3. Add eggs one at a time, whisking well after each addition.
4. Mix in the red food coloring.
5. Sift in cocoa powder, flour, and salt, and fold gently until just combined.
6. Reserve ¼ cup of the brownie batter for swirling, then spread the remaining batter evenly into the prepared pan.

2. Make the Cheesecake Swirl:

1. In a separate bowl, beat cream cheese and sugar until creamy and smooth.
2. Add egg white and vanilla extract, mixing until fully combined.

3. Swirl & Bake:

1. Drop spoonfuls of the cheesecake mixture over the brownie batter.
2. Dollop the reserved brownie batter over the top.
3. Use a knife or skewer to create swirls for a marbled effect.
4. Bake for 30-35 minutes, or until the edges are set and the center is slightly jiggly.
5. Allow to cool completely before slicing into squares.

4. Serve & Enjoy:

• These Red Velvet Cheesecake Swirl Brownies are perfect for Valentine’s Day celebrations or as a sweet treat anytime!