Beat the whipping cream, sugar and vanilla until it forms soft peaks.
Add in mascarpone cheese and combine until it forms stiff peaks.
Quickly dip the ladyfingers in coffee, then layer the bottom of a glass baking dish with the ladyfingers
Spread � of the cream mixture evenly on top of the ladyfingers. Repeat the process with a second layer of ladyfingers and cream mixture.
Using a strainer, dust the top of your tiramisu with cocoa powder. Cover and refrigerate overnight.
Slice and serve!