01 - Line a baking sheet with parchment paper.
02 - Peel the bananas and slice into 1 cm thick rounds. Arrange the slices on the prepared baking sheet.
03 - Top each banana slice with a small dollop (about ½ tsp) of peanut butter, if desired.
04 - Place the baking sheet in the freezer for 30 minutes until the banana slices are firm.
05 - Melt the chocolate chips in a microwave-safe bowl in 30-second increments, stirring between each, until smooth. Alternatively, use a double boiler.
06 - Remove the banana slices from the freezer. Using a fork or toothpick, dip each slice into the melted chocolate, coating completely. Let excess chocolate drip off.
07 - Return chocolate-coated banana slices to the baking sheet. If desired, immediately sprinkle with crushed nuts, coconut, or sprinkles before the chocolate sets.
08 - Freeze for at least 1½ hours or until completely firm.
09 - Serve frozen. Store leftovers in an airtight container in the freezer for up to 2 weeks.