2 large eggs
1/2 cup (1 stick) unsalted butter
1 cup sugar
2 teaspoons vanilla extract
1/4 cup unsweetened cocoa powder
1/8 teaspoon salt
1 Tablespoon red food coloring
3/4 teaspoon white vinegar
3/4 cup all-purpose flour (are you measuring flour the correct way?)
8 ounces cream cheese, softened
1/4 cup sugar
1 egg yolk
1/2 teaspoon vanilla extract
Preheat the oven to 350F degrees. Spray 8x8 baking pan with nonstick spray. Set aside.
Make the brownie layer first. In a small bowl, beat the 2 eggs together. Set aside. Melt the butter in a large microwave safe bowl in 30 second increments until melted. Stir in 1 cup sugar, 2 teaspoons vanilla extract, cocoa powder, salt, food coloring, and vinegar. Mix each of those ingredients into the batter in that order. Whisk in the eggs, then fold in the flour until completely incorporated. Do not overmix. Pour the brownie batter into prepared baking pan, leaving about 3-4 Tablespoons for the top.
Make the cheesecake swirl. With a hand-held mixer on medium speed, beat the softened cream cheese, 1/4 cup sugar, egg yolk, and 1/2 teaspoon vanilla in a medium bowl until completely smooth - about 1 minute. Dollop spoonfuls of the cream cheese mixture on top of the prepared brownie batter. Cover with the last few Tablespoons of brownie batter. Glide a knife through the layers, creating a swirl pattern.
Bake the brownies for 28-30 minutes or until a toothpick inserted in the middle comes out clean. Allow the brownies to cool completely before cutting into squares. Store brownies at room temperature or in the refrigerator.
Recipe source: Sally's Baking Addictionn