No-Bake Reese's Cheesecake

In a large bowl, combine whipped heavy cream with softened cream cheese and sugar and stir until completely combined. (If cream cheese clumps remain, transfer mixture to a stand mixer or use a hand mixer. Fold in chopped Reese's and peanut butter. Pour mixture into prepared pie crust, smoothing over top with a rubber spatula. Top with more chopped Reese's, cover with plastic wrap, and refrigerate until firm, at least 4 hours.