01 - Place the frozen banana slices into a high-powered blender or food processor bowl.
02 - Blend on high speed, stopping to scrape down the sides with a rubber spatula as needed, until the mixture becomes completely smooth and creamy, approximately 1 to 2 minutes.
03 - Add the vanilla extract or any desired flavor additions such as cocoa powder or frozen berries, then blend again until fully incorporated.
04 - For a firmer, scoopable texture, transfer the mixture to a freezer-safe container and freeze for 1 to 2 hours before serving.
05 - Scoop into serving bowls, top with desired garnishes such as chopped nuts, cacao nibs, or fresh fruit, and serve immediately.