In a stand mixer, whip the softened butter and shortening on medium speed for 2-3 minutes until it is almost white in appearance. Scrape the sides of the bowl as needed.
Add the vanilla and powdered sugar. Mix on low speed until the powdered sugar is all incorporated. Scrape the sides of the bowl as needed.
Add in the heavy cream, one tablespoon at a time, and beat the frosting on medium speed until the frosting has reached the consistency that you like. (I used 6-7 tablespoons of cream).
Add the Oreo cookies to the frosting, 3 at a time, and beat on medium-low speed until they are all broken up and blended in.
This recipe makes about 4 cups of frosting.
1 serving is about 1/3 cup frosting. Since different brands of ingredients have different nutritional information, the calories shown are just an estimate. **We are not dietitians and recommend you seek a nutritionist for exact nutritional information.**