This insanely delicious no-bake chocolate Oreo Peanut Butter Pie has a creamy peanut butter mouse filling, with an Oreo cookie crust and is topped with fresh whipped cream and crushed peanut butter cups. This recipe does not use any cool whip, instead opting for freshly made whipped cream, cream cheese and sour cream to give it a luscious made from scratch flavor and texture.