In a medium saucepan over medium heat, melt peanut butter, cream cheese and butter and stir together until well-combined. Remove from heat and set aside.
In a large mixing bowl, add heavy cream, vanilla extract, Stevia and Perfect Keto Chocolate Exogenous Ketone Supplement. Pour in peanut butter mixture and mix with hand mixer until smooth.
Pour fudge into prepared baking sheet and spread evenly. Sprinkle coarse sea salt on top.
Chill in refrigerator for at least 4 hours, preferably overnight.