1.Combine coffee and ⅓ cup of the liqueur in a small bowl. Dip biscuits, one at a time, into coffee mixture. Line four 1-cup (250ml) glasses with biscuits; drizzle with any remaining coffee mixture.
2.Beat cream and sifted icing sugar in a small bowl with an electric mixer until soft peaks form; beat in mascarpone and remaining liqueur just until combined. Divide among glasses.
3.Using a vegetable peeler, shave a little chocolate over each tiramisu.
To make strong coffee, dissolve 2 tablespoons instant espresso coffee granules in ½ cup boiling water. If you have a coffee machine, make enough espresso shots to give you the same quantity.Note