Line your silicone mold or mini muffin tin with parchment paper for easy removal.
Gently melt the chocolate using a double boiler or microwave in short bursts, stirring until smooth and glossy. You should hear a gentle bubbling or see a silky, shiny liquid forming.
Spoon about 1-2 teaspoons of melted chocolate into each mold cavity, tilting the mold slightly to coat the sides evenly. Chill for 5 minutes until the chocolate begins to set.
While the chocolate chills, stir the peanut butter with a pinch of salt and a tablespoon of honey or maple syrup until smooth and creamy. It should be soft and easy to scoop.
Remove the mold from the fridge and drop a small spoonful of the peanut butter mixture into each chocolate shell. Gently press down to flatten the filling slightly.
Cover the peanut butter layer with more melted chocolate, spooning until each mold cavity is fully filled and the filling is completely enclosed. Chill for 30 minutes until the chocolate is firm and shiny.
Once set, gently pop the peanut butter cups out of the mold. If desired, sprinkle a few flakes of sea salt on top for added flavor and texture.
Let the cups sit at room temperature for a few minutes before serving to enjoy their shiny, smooth finish and creamy interior. Store leftovers in an airtight container in the fridge or freezer.