Dip ladyfingers in the soak for 1-2 seconds per side and arrange a layer in a 9x9" pan.
Spread half of the hot chocolate mascarpone cream evenly on top.
Gently pour ~½ cup of hot chocolate on top and spread it by tilting the pan.
Freeze for 10 minutes to set the hot chocolate.
Repeat the three layers (ladyfingers, mascarpone cream, hot chocolate).
Cover and refrigerate the tiramisu overnight (or at least 4 hours).