Line a small baking dish or container with parchment paper or foil.
In a microwave-safe bowl, combine the peanut butter and coconut oil.
Microwave in 30-second intervals, stirring in between, until the mixture is smooth and well combined.
Stir in the powdered erythritol, vanilla extract, and a pinch of salt until fully incorporated.
Pour the mixture into the prepared baking dish and spread it out evenly.
Place the dish in the refrigerator and chill for at least 2 hours, or until the fudge is firm.
Once firm, cut the fudge into squares and serve.
Enjoy your delicious Keto Peanut Butter Fudge!
