Prep the lavender whip the day before: In a container, add heavy cream and lavender. Store in the fridge overnight (at least 12 hours)
The next day, pour the cream through a fine mesh strainer to remove the lavender.
Add sugar and whip until peaks form. Set aside while you make the cakes.
Make the Oreo crust: Blend the Oreo cookies into a food processor until they are fine crumbs.
Melt butter and add the blended cookies until combined.
Press the blended cookies into the sides and bottom of each cocotte. Use a tablespoon or small spoon to press into the sides in an even layer. Transfer to the freezer.
Make the filling: In a bowl, beat the cream cheese and vanilla until smooth and fluffy, then using a fine mesh strainer, add in the icing sugar and matcha powder, beating until combined.
Whip the cream until soft peaks form and then gently fold in the whip into the cream cheese filling until combined and smooth. Add to each cocotte. Transfer to the freezer and let set for at least 6 hours.
When ready to serve, add a spoonful of the whip to each cocotte and dust with matcha powder. Add a few sprigs of lavender for garnish. Enjoy!