Line your pan with parchment paper to make removal easier, then set it aside.
In a microwave-safe bowl, melt the peanut butter and honey together in 30-second bursts, stirring in between until the mixture is smooth, glossy, and well combined.
In a large mixing bowl, combine the rolled oats and chopped dark chocolate, stirring to distribute evenly.
Pour the melted peanut butter mixture over the dry ingredients, then fold everything together thoroughly until the oats and chocolate are coated and sticky.
Transfer the mixture into your prepared pan and press it down firmly with the back of a spatula or your fingers, creating an even layer with a smooth top.
Place the pan in the fridge and chill for at least 2 hours, or until the mixture is set and firm to the touch.
While waiting, melt the additional chocolate for drizzling, if using, and set aside.
Once the bars are fully chilled and firm, lift them out of the pan using the parchment paper and cut into squares or rectangles with a sharp knife.
If desired, drizzle the melted chocolate over the cut bars for a glossy finish, then sprinkle a pinch of flaky sea salt on top for that perfect salty-sweet crunch.
Return the bars to the fridge for about 30 minutes to allow the chocolate drizzle to set before serving.
Enjoy these crunchy, gooey bars straight from the fridge or at room temperature for a satisfying treat that’s quick and customizable.
