Line a mini muffin pan with paper liners and set aside.
In a medium microwave safe bowl, microwave the Nutella and coconut oil in 30 second intervals, mixing until smooth.
Mix in the espresso powder.
Divide the Nutella mixture into the prepared muffin pans. Place in the freezer to harden.
Notes
Storage: Place the hardened Nutella cups in an airtight container and store in the fridge or the freezer.
Use a cookie scoop. When distributing the batter into each cavity of the mini muffin pan, use a medium cookie scoop to avoid mess. This is the cookie scoop I use, but any spring loaded cookie scoop would work.
Do not substitute the coconut oil. The coconut oil is essential in this recipe as it helps the Nutella cups solidify when chilled. You cannot replace it with a liquid neutral oil as they will not keep their shape.
Don't have espresso powder? Use instant coffee instead! Just make sure to crush the instant coffee granules to make it easier to dissolve in the melted Nutella mixture.