Begin by taking your Oreos or chocolate sandwich cookies and separating the cream filling from the cookies. Place the filling in a small bowl and crush the cookies into fine crumbs.

Microwave the reserved cream filling for approximately 20 seconds to soften it.

In a large mixing bowl, whip the heavy whipping cream on medium speed until it becomes frothy and starts to thicken, aiming for soft peaks.

Once soft peaks are achieved, gently pour in the melted cream filling and sift in the powdered sugar. Mix on medium speed until stiff peaks form.

Fold the crushed Oreo cookie crumbs into the whipped cream mixture gently.

Carefully spoon or pipe the mousse into serving dishes. Top with reserved cookie crumbs and a whole Oreo if desired.

You can enjoy the mousse immediately or refrigerate it for about 30 minutes for a firmer texture.