Melt the chocolate.
Add chocolate chips and coconut oil to a microwave-safe bowl. Heat in 20-second bursts, stirring each time, until smooth and glossy. Don’t rush this—burnt chocolate is a heartbreak no one needs.
Line your muffin pan.
Place paper liners in a standard muffin tin. This makes removing the cups stupidly easy later. Skipping liners = regret.
Create the chocolate base.
Spoon about a tablespoon of melted chocolate into each liner. Tilt the pan slightly so it spreads evenly. Pop the pan into the freezer for 5 minutes to set.
Mix the filling.
In a bowl, stir together peanut butter, Nutella, vanilla (if using), and a pinch of salt until smooth. It should look dangerously spoonable.
Add the filling.
Scoop the peanut butter Nutella mixture onto the frozen chocolate bases. Press it down gently so it spreads evenly.
Seal with more chocolate.
Spoon the remaining melted chocolate on top, covering the filling completely. Tap the pan lightly to smooth it out.
Freeze until firm.
Place the pan back in the freezer for at least 30–40 minutes, or until solid. Then try not to eat them all immediately. (No promises.)