Cover a baking sheet with parchment paper. Slice each banana into thin slices and arrange half the pieces on the baking sheet.  

Spread nut butter onto each banana slice, then cover each slice with another slice. Place in the freezer for about 30 minutes or until frozen.  

Place the coconut oil in a microwave safe bowl and microwave until melted, about 15 seconds. Stir in the chocolate, continue to microwave in 15-30 second increments, until smooth. Use a fork or spoon to cover each banana bite in chocolate, then place back on the sheet. Freeze for one hour and enjoy!