The layered tiramisu represents the 'compound effect' of habits, as each layer adds to the final sumptuous experience, much like small habits build towards significant life changes.
Combine coffee and liqueur in a shallow dish.
Dip ladyfingers briefly into the coffee mixture.
Layer half of the soaked ladyfingers in a dish.
Whip mascarpone, cream, and sugar until soft peaks form.
Spread half of the mascarpone mixture over the ladyfingers.
Repeat layers and dust with cocoa powder.
Refrigerate for at least 2 hours before serving.