- Brew espresso and let it cool to room temperature. Meanwhile, whisk pumpkin puree, sugars, cinnamon, nutmeg, vanilla, and a pinch of salt until smooth. 
- In a separate bowl, whip cold heavy cream to soft peaks. Gently fold in mascarpone until fully combined and fluffy. 
- Add the pumpkin mixture and stir carefully to maintain airiness. The cream should be silky and light. 
- Dip each ladyfinger briefly in espresso—avoid soaking them completely to prevent mushiness—and place into serving cups or small glasses. 
- Spoon a layer of pumpkin-mascarpone cream over the soaked ladyfingers, then repeat with another layer of coffee-dipped biscuits and cream. 
- Smooth the tops with a spatula and dust with cocoa powder for that signature tiramisu finish. 
- Cover and refrigerate for at least 4 hours, preferably overnight, so the layers set and flavors meld.