01 -
Preheat oven to 175°C. Grease and line a 20 x 20 cm baking pan with parchment paper.
02 -
In a medium bowl, whisk together the melted butter and granulated sugar until smooth. Add eggs and vanilla extract, mixing well.
03 -
In a separate bowl, whisk the flour, cocoa powder, baking powder, and salt. Gradually incorporate the dry ingredients into the wet mixture and mix until just combined.
04 -
Gently fold in the semi-sweet chocolate chips, if using.
05 -
Pour the brownie batter into the prepared pan and spread evenly. Bake for 18–22 minutes, or until a toothpick inserted into the center emerges with a few moist crumbs. Allow to cool completely in the pan on a wire rack.
06 -
In a large mixing bowl, whisk together mascarpone cheese, heavy cream, powdered sugar, espresso, and vanilla extract until smooth and creamy. For best results, use a hand or stand mixer.
07 -
Once the brownie base is completely cooled, spread the tiramisu layer evenly over the top using a spatula. Smooth the surface for an even finish.
08 -
Refrigerate for at least 2 hours, until the tiramisu layer is firm and set.
09 -
Before serving, dust the top with unsweetened cocoa powder, slice into squares, and serve chilled.