Slice the ripe bananas and arrange them in a single layer on a baking sheet.
Freeze the banana slices for at least 4 hours or until completely frozen.
Add the frozen banana slices to a food processor or high-speed blender.
Sprinkle in the matcha powder.
Pour in the plant-based milk and vanilla extract if using
Add vanilla extract if using
Blend the mixture until it becomes smooth and creamy. You may need to scrape down the sides a few times to ensure everything is well combined
If the mixture is too thick, add a little more plant-based milk, one tablespoon at a time, until you reach your desired consistency.
Scoop the matcha nice cream into bowls and enjoy immediately for a soft-serve texture.
For a firmer texture, transfer the nice cream to an airtight container and freeze for an additional 30 minutes before serving.