01 -
Preheat oven to 175°C. Butter and line an 8×20 cm metal loaf pan with parchment paper for easy release.
02 -
In a microwave-safe mixing bowl, melt unsalted butter and chocolate chips in 30-second intervals, stirring between each, until fully smooth.
03 -
Whisk in Dutch process cocoa powder, granulated sugar, and instant espresso powder until fully dissolved.
04 -
Whisk in the whole egg and egg yolk, beating the mixture vigorously for 1–2 minutes until glossy and homogenous.
05 -
Using a rubber spatula, gently fold in all-purpose flour and salt just until combined and no streaks remain.
06 -
Pour batter into prepared pan, smooth the surface, and bake for 25–30 minutes until the edges are set and the center wobbles slightly, or a thermometer registers at least 82°C.
07 -
Remove from oven and allow brownie base to cool completely in the pan on a wire rack.
08 -
In a medium bowl, using a hand or stand mixer, briefly beat mascarpone, sugar, and vanilla until cohesive. Gradually add heavy cream and beat until soft peaks form. Refrigerate until required.
09 -
Combine cooled espresso and coffee liqueur in a shallow bowl.
10 -
Briefly dip each ladyfinger into the espresso mixture, ensuring both sides are coated. Arrange in a single layer over the cooled brownie base.
11 -
Spread or pipe mascarpone whipped cream over ladyfingers. Cover and refrigerate at least 1 hour to set.
12 -
Dust surface with Dutch process cocoa powder before slicing and serving.