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