Add the room-temperature mascarpone cheese and mix it until smooth and creamy. Do not overmix it to stop it from curdling.
Dip the Oreos quickly in the coffee mixture (2-3 seconds) and lay them in an even layer in the 13 by 9-inch baking dish.
Top the soaked Oreos with half of the mascarpone mixture and smooth it out with an offset spatula.
Add another layer of the dipped Oreos. Top the Oreos with the second half of the mascarpone cream and smooth it out with a spatula.
Cover with plastic wrap and place in the fridge for at least 4 hours to allow the ladyfingers to soften. Generously top the tiramisu with plenty of cocoa powder and serve!
Notes
Scrape down the sides of the bowl frequently to ensure that you have a homogeneous mixture that has no cheese lumps.
Make sure that you are using room-temperature mascarpone cheese in this recipe, this step makes it easier to mix the cheese with no unnecessary lumps, we don’t want that in your cream mixture.
Use high-fat mascarpone cheese. Using full-fat cream mascarpone ensuresthat your dessert will be stable.
Allow proper chilling time. Refrigerate your tiramisu for at least 4-6 hours, or preferably overnight. This allows the flavors to meld and the dessert to set properly, resulting in cleaner slices and a more cohesive taste.
Avoid overmixing the cream. Overmixing can lead to a grainy texture and affect the overall consistency of your tiramisu. Mix the cream just until it reaches soft peaks, then gently fold it into the other ingredients.
Dust with cocoa powder just before serving. To prevent the cocoa powder from absorbing moisture and becoming soggy, add this final touch right before presenting your tiramisu. This ensures a fresh, attractive appearance and adds a burst of chocolate flavor.
Soak the Oreos briefly. Dip each Oreo in the coffee mixture for just 2-3 seconds. Over-soaking can lead to a soggy tiramisu, while under-soaking results in a dry texture.