01 -
Position oven rack in center and preheat oven to 175°C. Line a 23 cm x 23 cm pan with parchment paper, leaving a 5 cm overhang on all sides. Grease parchment with cooking spray.
02 -
In a large saucepan over medium heat, melt butter until it slightly bubbles. Add chocolate chips, reduce heat to low, and stir frequently until melted, about 2 minutes.
03 -
Remove saucepan from heat. Stir in granulated and brown sugars using a rubber spatula until mixed. Using a handheld mixer at medium speed, add eggs one at a time, beating well after each. Continue beating until mixture is pale and fluffy, approximately 3 minutes. Mix in vanilla extract and red food coloring until evenly blended.
04 -
Whisk flour, cocoa powder, and kosher salt in a small bowl. Fold dry ingredients into egg mixture gently with a spatula until flour is just incorporated; avoid overmixing.
05 -
In a medium bowl, beat egg, cream cheese, and granulated sugar at medium-high speed using a handheld mixer until smooth, 1 to 2 minutes.
06 -
Pour brownie batter into prepared pan and spread evenly. Using two spoons, dollop cheesecake batter on top, spacing about 1.25 cm apart. Swirl both batters gently with a butter knife to create a marbled effect.
07 -
Bake, tenting pan with foil if edges brown too quickly, until a tester inserted in center comes out with a few moist crumbs, about 30 to 35 minutes. Remove and allow to cool in pan for 20 minutes.
08 -
Lift brownies out of pan using parchment overhang and transfer to a cutting board. Cut into squares and serve.