Separate the yolks from the white of each of the 3 eggs and place in two different bowls. Set the whites aside.
Add 3 tbsp granulated sugar to the egg yolks and beat with an electric mixer for about 2 minutes until light and fluffy.
Add ¼ cup marsala wine to the yolks and beat again to combine.
Add 9 oz mascarpone into the yolk mixture and beat until smooth, firm, and fluffy. Set aside momentarily.
Use a stand mixer or an electric hand mixer to beat the egg whites on high until stiff peaks form.
Slowly fold the stiff egg whites into the mascarpone mixture. Be very gentle so as not to deflate the egg whites. Set aside.
Pour ½ cup coffee and ½ cup water in a shallow bowl and mix to combine.
Very quickly dip each side of the 18 ladyfingers in the coffee mixture. I dip each side for about 1 second. Do not allow them to soak for too long or they will get soggy and fall apart.
In an 8x8 pan, place a layer of coffee-soaked lady fingers across the bottom of the tray. Then top with half of the cream. Repeat with another layer of coffee-soaked lady fingers and the rest of the cream.
Use a sifter to dust a thin layer of cocoa powder over the top of the tiramisu.
Allow to sit for at least 3 hours in the fridge before serving. This allows time for the mascarpone mixture to set and the ladyfingers to soften. Cut into slices and serve. Enjoy!