Whip the mascarpone cream

• Whisk the mascarpone with the powdered sugar and vanilla extract until smooth.
• Pour in the cold cream and whip until thick and fluffy.

Dip the Oreos

• Pour the milk into a shallow bowl.
• Quickly dip each Oreo in the milk so it softens without falling apart.

Layer the tiramisu

• Line the bottom of a dish with a layer of dipped Oreos.
• Spread half of the mascarpone cream over the biscuits.
• Repeat with a second layer of dipped Oreos and the remaining cream.

Chill

• Cover the dish and refrigerate until set.

Decorate and serve

• Dust the top with cocoa powder through a sieve.
• Crush a few Oreos and scatter them over the top before serving.