Slice all 4 bananas into 1/4-inch thick rounds—I find using a sharp knife and cutting at a slight angle makes uniform slices easier. Arrange the banana slices on a parchment-lined baking sheet and place in the freezer while you prepare the chocolate coating. This head start on freezing helps the banana maintain its structure when you're assembling the bites.

Remove the banana slices from the freezer. Spread about 1/2 teaspoon of peanut butter on the flat side of one banana slice, then press another banana slice on top to create a sandwich, with the peanut butter in the middle. Work quickly so the banana doesn't warm up too much. Arrange all assembled bites back on the parchment-lined tray, spacing them slightly apart.

Place the tray of peanut butter banana bites in the freezer for at least 1 hour until they're completely solid. This is crucial—frozen bites will hold their shape when you dip them in chocolate and won't fall apart.

Combine the chocolate chips and coconut oil in a microwave-safe bowl. Microwave in 30-second intervals, stirring between each interval, until completely melted and smooth. The coconut oil helps thin the chocolate to the right consistency for dipping without making it too runny. This usually takes 1 to 1.5 minutes total, depending on your microwave's power.

Working quickly, remove the frozen bites from the freezer. Hold each bite by the top and dip the bottom half into the melted chocolate, then place it back on the parchment-lined tray with the chocolate side down. I like to let the chocolate coating set for a few seconds before moving to the next bite so they don't stick together.

Return the chocolate-dipped bites to the freezer for 15 minutes to set the chocolate coating completely. Once frozen solid, transfer to an airtight container and store in the freezer for up to 2 weeks. Eat directly from the freezer for the best texture—the combination of frozen banana, creamy peanut butter, and crispy chocolate coating is simply perfect.