01 - Peel bananas and slice into 1/2-inch thick rounds.
02 - Line a baking sheet with parchment paper and place banana slices in a single layer.
03 - Freeze banana slices for at least 1 hour until firm.
04 - Combine chocolate and coconut oil (if using) in a heatproof bowl over simmering water or microwave in short bursts, stirring until smooth.
05 - Using a fork or toothpick, dip frozen banana slices into melted chocolate, letting excess drip off.
06 - Place chocolate-covered slices back on parchment and immediately sprinkle with chopped peanuts before chocolate sets.
07 - Repeat dipping and topping for all slices, then freeze for 15–20 minutes until chocolate is firm.
08 - Serve frozen for best texture and flavor.