"I came up with this recipe for us folks who want amazing frosting but don't want to use confectioners' sugar! I wanted to create something fluffy, creamy, and delicious. My friends and family rave over this frosting! It goes perfectly with chocolate cake."
Beat sugar and butter together in a large bowl using an electric mixer on medium speed until smooth and no longer gritty, about 5 minutes. Add peanut butter, cream, and vanilla extract to the butter mixture. Beat on medium speed until frosting is well-mixed and smooth, 5 to 7 minutes.
Transfer frosting to an airtight container and refrigerate until firm, 1 to 2 hours.