Peel and slice bananas into 1.5cm rounds.
Arrange in a single layer on a lined baking sheet. Freeze minimum 2 hours or overnight until completely solid.
Transfer frozen slices to blender or food processor. Add salt, vanilla, and any flavour additions.
Blend on high, scraping down sides every 30 to 45 seconds. Blend through the crumbly stage until completely smooth and creamy. This takes 1 to 3 minutes.
Add one tablespoon of liquid at a time only if blender struggles to move.
For soft-serve texture, serve immediately directly from the blender.
For scoopable texture, transfer to an airtight container. Press cling wrap directly onto the surface. Freeze 1 to 2 hours.
Remove from freezer. Rest 3 to 5 minutes before scooping.
Serve with chosen toppings.