In a mixing bowl, add 1 cup of heavy cream and whip it with an electric mixer on medium speed until soft peaks form, about 3-4 minutes. Then, add in 8 ounces of cream cheese, beating until smooth and creamy, around 2 more minutes. Gently fold in a packet of vanilla pudding mix, combining until fully incorporated and the mousse is fluffy and light.

Take a package of Oreo cookies and place them in a zip-top bag. Using a rolling pin, crush the cookies into fine crumbs, ensuring you have about 1-2 cups for layering. Alternatively, you can use a food processor for a quicker method; pulse until you achieve a sandy texture. Set the crushed Oreos aside for layering in your dessert cups.

Grab 4 clear dessert cups and begin by adding a layer of crushed Oreos at the bottom, about 1-2 tablespoons high. Next, spoon a layer of the prepared mousse on top of the Oreos, filling the cup about halfway. Repeat this process, alternating layers of crushed Oreos and mousse until the cups are full, leaving a bit of space at the top for a final decorative touch.

Once filled, cover your dessert cups with plastic wrap and refrigerate them for at least 1 hour to allow the mousse to set perfectly. If you want to prepare them in advance, they can chill for up to 24 hours. For an added crunch, consider placing a whole Oreo on top of each cup just before serving.

When it's time to serve the No-Bake Oreo Dessert Cups, take them out of the refrigerator. Optionally, garnish each cup with whipped cream, chocolate shavings, or extra crushed Oreos for a delightful presentation. Serve chilled, and enjoy the happy faces as everyone digs into these decadent dessert treats!