In a mixing glass, add Coffee (250 milliliter), half of the Powdered Confectioners Sugar (3/4 cup) and Coffee Liqueur (2 tablespoon). Stir with a spoon until combined. Reserve 3 tablespoons of the mixture for later.
Arrange Ladyfingers (8) in a glass baking dish and pour the remaining coffee mixture over the top. Set aside for 15 minutes to allow the liquid to absorb.
In a large mixing bowl, add Whipping Cream (1 cup). Beat until the mixture forms soft peaks.
To the whipping cream, add Mascarpone Cheese (220 gram), the rest of the sugar and the reserved coffee mixture. Stir together until smooth.
To assemble the tiramisu cups, break biscuits in half and press two halves into the bottom of each serving glass. Spoon over the cream mixture. Repeat the layers once more in each glass. Dust Unsweetened Cocoa Powder (to taste) on top.
Place in fridge to chill for at least 2 hours.