Line a mini muffin pan with paper liners and set aside.
In a microwave-safe bowl, combine Nutella and coconut oil.
Microwave in 30-second intervals, stirring until smooth.
Evenly divide the mixture into the prepared muffin pan.
Place one mini vanilla wafer on top of each cup.
Freeze for about 5 minutes, or until firm.
Transfer Vanilla Wafer Nutella Cups to an airtight container and store chilled.