01 -
Butter and line an 8x20 cm (approx. 8x4 inch) metal loaf pan with parchment, leaving an overhang to lift brownies out easily.
02 -
Combine butter and chocolate chips in a microwave-safe bowl. Microwave in 30-second bursts, stirring between each, until fully melted and glossy.
03 -
Whisk in granulated sugar, cocoa powder, and instant espresso powder until sugar starts dissolving and mixture thickens.
04 -
Add the whole egg and egg yolk. Whisk vigorously for 1–2 minutes until mixture is smooth and shiny.
05 -
Sprinkle flour and salt over the mixture. Fold gently until no dry flour remains—do not overmix.
06 -
Spread the batter evenly into the pan. Bake in a preheated oven at 175°C (350°F) for 25–30 minutes, until the sides pull away and the center is just set. Internal temperature should reach at least 82°C (180°F). Cool completely in the pan.
07 -
Mix cooled espresso with coffee liqueur if using.
08 -
Briefly dip each ladyfinger into the coffee soak and arrange in a single layer atop the cooled brownie base.
09 -
Beat cold mascarpone, granulated sugar, and vanilla bean paste just until blended. Add cold heavy cream and whip on medium speed until soft peaks form. Refrigerate until ready to use.
10 -
Spread or pipe the mascarpone cream evenly over the ladyfingers. Refrigerate for at least 1 hour to set layers and enhance flavors.
11 -
Before serving, dust generously with cocoa powder. Slice with a sharp knife directly from the refrigerator for clean layers.