01 - Line a 12-cup mini muffin tin with paper liners, pressing them firmly into place.
02 - Combine chocolate and coconut oil in a heatproof bowl set over a pot of gently simmering water. Stir constantly until completely smooth and glossy. Alternatively, microwave in 20-second intervals, stirring well between each burst.
03 - Spoon approximately 1 teaspoon of melted chocolate into each liner. Using the back of a spoon, gently spread the chocolate up the sides to form cups. Freeze for 10 minutes until set.
04 - In a mixing bowl, combine peanut butter, softened butter, powdered sugar, sea salt, and vanilla extract. Beat with a spoon or electric mixer until completely smooth and creamy.
05 - Divide the peanut butter mixture into 12 equal portions, approximately 1 teaspoon each. Roll into balls and flatten into discs slightly smaller than the diameter of the muffin cups.
06 - Place one peanut butter disc into each chocolate-lined cup. Cover with another teaspoon of melted chocolate, spreading to seal the edges and completely encase the filling.
07 - Refrigerate the tray for 30 minutes or until the chocolate is completely firm. The cups should hold their shape when touched.
08 - Carefully remove the cups from the tin. Store in an airtight container in the refrigerator for up to 1 week for optimal texture and freshness.