Using a whisk, beat the egg yolks and gradually add the sugar. Whisk until mixture smoothens out and thickens and is a yellow in color
Mix the mascarpone into the yolk mixture
Add hazelnut creamer into the coffee until desired taste
Dip the ladyfingers into the coffee and moisten them without making them soggy
Arrange 4 ladyfingers side by side on a plate. Spread the mascarpone mixture over the ladyfingers and dust lightly with cocoa powder
Layer 4 more on top and repeat the process
Refrigerate and serve chilled