Beat the Tiramisù dessert base in a mixer for approximately 3 minutes. Transfer to a piping bag.
Pipe a 1st layer of the dessert base into the bottom of each glass. Top with a ladyfinger biscuit well soaked in blackcurrant coulis, a spoonful of chestnut paste, and candied chestnut pieces.
Repeat. Top with a layer of Tiramisù dessert base and sprinkle with candied chestnut pieces.
Depending on the season, blackcurrants may be replaced by other fruit!