**To make the freshly whipped cream, beat 1-1/4 cups cold heavy cream with 1/4 cup powdered sugar until stiff peaks form. Set aside.
In the bowl of a stand mixer or using a hand mixer, combine the cream cheese and peanut butter until creamy. Add freshly whipped cream or Cool Whip and beat until smooth.
*Thin hard oatmeal cookies work best (I used a generic store brand) but feel free to use your favorite brand. Avoid the soft and chewy brands like Pepperidge Farms or Mrs. Fields, as they might not hold up as well.