01 -
Make a pot of coffee and pour 1 cup into a wide shallow container. Stir in the rum (if using) and almond flavoring, then set it aside.
02 -
Separate the yolks from the whites, placing the yolks into one small bowl and the whites in the stand mixer for whisking later.
03 -
Whisk the whites on high speed in the mixer, slowly adding 1/3 cup of the sugar. Keep whipping until soft peaks form—it'll take about 3 minutes. Scoop this mix into a big bowl.
04 -
In the stand mixer bowl, whip the yolks and the remaining 1/3 cup sugar. Do this on high speed until it looks fluffy and light yellow. Mix in the chilled mascarpone cheese next.
05 -
Add pistachio cream, vanilla flavoring, and almond flavoring into the yolk mixture and stir until everything is smoothly blended.
06 -
Carefully fold half of your yolk-pistachio mix into the whipped whites using a spatula. Add the rest and gently mix until everything's just combined, without deflating those whites.
07 -
Quickly dunk the lady fingers into the coffee liquid—flip them to coat both sides—and arrange them as a single layer in a 9x9-inch dish. Cover them evenly with half the mascarpone mixture.
08 -
Repeat with the rest of the lady fingers and mascarpone mix. Finish by sprinkling the top with finely chopped pistachios for that extra crunch.
09 -
Cover your dessert and let it chill in the fridge for at least 4 hours, or even overnight, before you serve it up.