Line your mini muffin tin with paper cups or silicone molds to prepare for pouring.
Gently melt the dark chocolate using a double boiler or microwave in short 20-second bursts, stirring in between until smooth and shiny. The aroma should be fragrant and roasted.
Pour about a teaspoon of melted chocolate into each mold, tilting or swirling to evenly coat the bottom. Place the tin in the fridge for 5 minutes to set the first layer.
While the chocolate chills, whisk the peanut butter with honey and a pinch of sea salt until smooth and creamy. This creates a sweet, nutty filling with a hint of saltiness.
Remove the mold from the fridge and spoon about a teaspoon of peanut butter mixture into each chocolate shell, gently pressing it down and smoothing the top with the back of a spoon.
Cover the peanut butter layer with the remaining melted chocolate, pouring enough to fully enclose the filling. Tap the tray lightly to remove air bubbles.
Sprinkle a tiny pinch of sea salt on top of each cup for an extra flavor boost. Chill the entire tray in the fridge for at least 30 minutes until the chocolate is firm and glossy.
Once set, carefully pop the peanut butter cups out of the molds or peel away the silicone. They should have a shiny, crisp shell with a smooth, nutty interior.
Let the cups sit at room temperature for 10 minutes before serving to enhance flavor and texture. Enjoy these homemade treats fresh or store in an airtight container in the fridge.