Prepare a 20 × 20 cm square pan.
Dip each ladyfinger briefly into the coffee with milk, making sure they are moistened but not soaked.
Arrange the dipped ladyfingers in a single, even layer on the bottom of the pan.
In a mixing bowl, whip the heavy cream until it reaches soft peaks.
Add the mascarpone cheese and 2 tablespoons of caramel cream. Continue mixing until smooth and semi-firm.
Divide the mascarpone filling into 2 equal portions.
Spread the first half of the filling evenly over the ladyfingers.
Dip the remaining ladyfingers into the coffee with milk and arrange them over the cream layer.
Spread the second half of the filling evenly over the second layer of ladyfingers and smooth the top.
Refrigerate for at least 1 hour so the layers can set.
Gently melt the caramel cream for the topping over steam. If it is too thick, add a small amount of milk until it becomes pourable.
Let the caramel cool slightly, then pour it evenly over the chilled cake.
Decorate as desired, slice, and serve.