Line an 8x8-inch baking pan with parchment paper, allowing some overhang for easy removal later.
In a microwave-safe bowl, melt the coconut oil until it’s completely liquid, about 20-30 seconds in the microwave.
Combine the melted coconut oil and almond butter in your mixing bowl, stirring until well incorporated. Add the vanilla extract and sea salt, mixing until smooth and creamy.
Pour the almond butter mixture into the prepared baking pan, using your spatula to spread it evenly.
Place the pan in the refrigerator and allow the fudge to set for at least 2 hours.
Once set, lift the fudge out of the pan using the parchment overhang and slice it into squares.