Peel and slice the bananas to about 1-inch thickness. Spread some peanut butter on one side of half of the sliced bananas then put another slice of banana on top of the peanut butter to create a "sandwich". Gently slide skewers or toothpicks in the middle of the bananas, if you are using them.
Place the bananas on a pan lined with parchment paper then pop them in the freezer for 30 minutes to 1 hour.
In the meantime, add the chocolate chips and coconut oil to a pot and heat on low until melted.
Transfer the chocolate to a bowl then quickly dip in the bananas. Return the bananas to the freezer for another 30 minutes to 1 hour.