Slice the Medjool dates in half and remove the pits.
Press each date half flat onto a sheet of parchment paper to create an even layer. Arrange the dates close together so they form a bark base. You can use a fork or a rolling pin to press and flatten them down a bit to help.
Place the peanut butter in a microwave-safe bowl and heat in 30-second increments, stirring between each, until it becomes easily pourable.
Pour the melted peanut butter over the pressed dates and use a spoon or spatula to spread it evenly.
Place the dates in the refrigerator or freezer for 15-20 minutes, or until the peanut butter hardens.
Melt the chocolate and coconut oil together in the microwave in 15-20 second intervals, stirring between each, until smooth, or use a double boiler.
Remove the chilled dates and peanut butter from the fridge or freezer. Drizzle the melted chocolate over the peanut butter layer, spreading it evenly to cover the surface.
Sprinkle your chosen toppings (crushed nuts, sea salt, shredded coconut, etc.) onto the chocolate while it’s still warm.
Return the bark to the refrigerator or freezer for 20-30 minutes, or until the chocolate is fully set.
Once hardened, remove the bark from the parchment paper and cut it into pieces. Store in an airtight container in the refrigerator or freezer.