Start by crushing the Oreo cookies into fine crumbs. In a Food Processor: Place the Oreos in a food processor and pulse until you achieve fine crumbs or In a Plastic Bag: Put the Oreos in a resealable plastic bag, press out the air, seal it, and crush the cookies with a rolling pin until fine.
In a large mixing bowl, add the cubed butter and beat on medium-high speed with a hand mixer or stand mixer until smooth and creamy (about 2-3 minutes).
Gradually add the sifted powdered sugar, about half a cup at a time, beating on low speed after each addition until combined. Once incorporated, increase the speed to medium-high and beat until the frosting is light and fluffy.
Pour in the vanilla extract and salt. Mix well to incorporate.
With the mixer on low, slowly add the room-temperature whipping cream. Continue to beat on medium-high until the frosting is smooth and fluffy.
Using a spatula, gently fold in the Oreo crumbs until evenly distributed throughout the frosting.
Prepare a piping bag fitted with a plain round tip such as a Wilton 1A nozzle and fill it with frosting.