Make the Mixture:In a large bowl, combine ladyfinger crumbs, mascarpone cheese, powdered sugar, espresso, vanilla extract, and salt. Mix until everything is fully incorporated and the dough is smooth.
Form Truffles:Scoop out small portions and roll into 1-inch balls using your hands. Place on a parchment-lined baking sheet.
Chill:Refrigerate the truffles for at least 30 minutes to firm up.
Coat:Once chilled, either dip the truffles in melted chocolate and let set, or dust them lightly with cocoa powder for a classic finish.
Serve:Serve chilled or at room temperature. Store leftovers in an airtight container in the fridge.