01 -
Preheat oven to 175°C (350°F). Grease and line a 20×20-cm (8×8-inch) baking pan with parchment paper.
02 -
In a medium saucepan, melt the butter over low heat. Remove from heat and stir in sugar, eggs, and vanilla until smooth. Mix in cocoa powder, flour, salt, and baking powder until thoroughly combined.
03 -
Spread brownie batter evenly in the prepared pan.
04 -
In a separate bowl, beat cream cheese, 1/4 cup sugar, egg, and vanilla extract until smooth and creamy.
05 -
Drop spoonfuls of the cheesecake mixture on top of the brownie batter. Add dollops of blackberry puree and swirl gently with a knife to create a marbled effect.
06 -
Bake for 35-40 minutes or until a toothpick inserted near the center comes out with only a few moist crumbs.
07 -
Cool completely in the pan before slicing. Dust with powdered sugar if desired.