01 - Peel the bananas and cut them into 1-inch rounds. Arrange the slices in a single layer on a parchment-lined baking sheet and freeze for at least 2 hours until completely solid.
02 - Transfer the frozen banana slices to a high-speed blender or food processor. Blend until creamy and smooth, pausing occasionally to scrape down the sides.
03 - If using vanilla extract, cocoa powder, or nut butter, add them now and blend again until fully incorporated.
04 - Serve immediately for a soft-serve consistency, or transfer to a freezer-safe container and freeze for 1–2 hours for a firmer scoopable texture.
05 - Top with fresh berries, chopped nuts, or dark chocolate chips as desired.