Make Ladyfingers
Beat egg whites until foamy. Add ½ cup sugar gradually, beat to stiff peaks.
Beat egg yolks with ½ cup sugar until pale and thick. Add 2 tsp vanilla.
Fold yolks into whites.
Sift flour and salt over mixture, fold together.
Pipe 3–4 inch strips.
Dust generously with powdered sugar. Dust again after 2 minutes.
Bake 12–15 minutes until lightly golden.
Cool completely.
Make Filling
Beat heavy cream, ¾ cup sugar, and 2 tsp vanilla to medium peaks.
Beat in mascarpone until smooth and thick.
Assemble Tiramisu
Dip ladyfingers quickly into coffee.
Arrange one layer in a 9x13 dish.
Spread half the filling over ladyfingers.
Repeat with another layer of dipped ladyfingers.
Spread remaining filling on top.
Cover and refrigerate at least 6 hours.
Dust generously with cocoa powder before serving.
