Directions
<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Begin by preparing the crust. Place the chocolate biscuits in a food processor and pulse until you have fine crumbs. This creates a uniform texture that will hold together perfectly when pressed into the pie dish. If you don't have a food processor, place the biscuits in a sealed plastic bag and crush with a rolling pin.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>Transfer the crumbs to a medium bowl and stir in the melted butter and sugar until the mixture resembles wet sand. The butter acts as a binding agent, helping the crust hold its shape after chilling. Press this mixture firmly and evenly into the bottom and up the sides of your pie dish, using the bottom of a measuring cup to create a smooth, even surface.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Refrigerate the crust for at least 30 minutes to firm up. Meanwhile, prepare the coffee syrup by combining the espresso, coffee liqueur, and sugar in a small saucepan. Heat gently until the sugar dissolves completely, then remove from heat and allow to cool. This syrup will infuse the ladyfingers with that distinctive tiramisu coffee flavor.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>For the mascarpone filling, place the egg yolks and 50g of the sugar in a heatproof bowl set over a pan of simmering water (ensure the bowl doesn't touch the water). Whisk constantly for about 5 minutes until pale and thick enough to leave a ribbon trail when the whisk is lifted. This gentle heating pasteurizes the eggs while creating a silky base for your filling.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Remove from heat and beat for another 2-3 minutes until cooled slightly. In a large bowl, beat the mascarpone until smooth, then gently fold in the egg yolk mixture until well combined. The mascarpone should be at room temperature to prevent lumps from forming in your filling.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>In a separate bowl, whip the double cream, remaining sugar, and vanilla extract until stiff peaks form. Be careful not to over-whip, which can cause the cream to become grainy and butter-like. Gently fold the whipped cream into the mascarpone mixture in three additions, maintaining as much air as possible for a light, mousse-like texture.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>To assemble the pie, quickly dip half of the ladyfingers one by one into the coffee syrup (about 2-3 seconds per side - any longer and they'll become too soggy and fall apart). Arrange them in a single layer over the chilled crust, breaking some if needed to fit.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Spread half of the mascarpone filling over the ladyfingers, creating an even layer. Dip the remaining ladyfingers in the coffee syrup and arrange them on top of the cream layer. Cover with the remaining mascarpone filling, smoothing the top with an offset spatula for a professional finish.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Refrigerate the pie for at least 6 hours, preferably overnight. This resting time allows the flavors to meld and the pie to set properly, making it easier to slice cleanly. Just before serving, use a fine mesh sieve to dust the top generously with cocoa powder, creating that classic tiramisu appearance.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>If desired, sprinkle the grated dark chocolate around the edge for additional decoration and flavor contrast. Slice with a warm, clean knife for the neatest presentation. This beautiful dessert will keep in the refrigerator for up to 3 days, though the crust may soften slightly over time.</li></ol>