Begin by crushing about 24 Oreo cookies into fine crumbs using a food processor or a rolling pin. Melt 5 tablespoons of butter and mix it with the cookie crumbs until thoroughly combined. Press this mixture firmly into the bottom of a 9x9-inch pan to form a solid crust. Refrigerate the crust for at least 15 minutes to ensure it sets properly.

In a large mixing bowl, beat 8 ounces of softened cream cheese using an electric mixer until smooth and creamy. Gradually sift in 1 cup of powdered sugar while mixing on medium speed, until the mixture becomes fluffy and well combined. Gently fold in 2 cups of whipped topping, followed by the juice and zest of 2 lemons, until everything is fully incorporated and smooth.

Once the crust is set, pour the lemon filling onto the chilled Oreo crust. Use a spatula to spread the filling evenly, smoothing the top for a neat finish.

Cover the dessert with plastic wrap and refrigerate for a minimum of 4 hours, though overnight is preferable. This chilling time allows the flavors to meld and the dessert to firm up for easier cutting later on.

When ready, remove the Heavenly Lemon Oreo Dessert from the refrigerator and slice it into squares. Serve each piece chilled for the best texture and flavor experience, and enjoy the refreshing balance of creamy lemon and crunchy chocolate.