Use a sharp paring knife to cut a small slice off the tip of the strawberries, creating a flat surface so the strawberries can stay upright.
Cut another slice off the opposite end of the strawberries to remove the leaves.
Use the knife to carve out the core of the strawberries, creating a cavity, then place the strawberries upright on a plate.
Add the chopped dark chocolate to a pot on the stove set to low heat.
Cook, stirring constantly until the chocolate has melted, then immediately remove the pot from the heat.
Transfer the melted dark chocolate to a small bowl.
Add the coconut oil, then mix well.
Spoon the chocolate mixture into the hollowed out strawberries, filling them completely.
Place the plate of chocolate strawberries in the fridge to chill for at least 45 minutes before serving.