Place the frozen banana slices, cocoa powder, maple syrup or agave nectar, vanilla extract, and a pinch of salt into a food processor or high-speed blender.
Blend the ingredients until smooth and creamy, scraping down the sides of the bowl as needed.
If the mixture is too thick, you can add a splash of non-dairy milk to help it blend.
Once the mixture is smooth, transfer it to a freezer-safe container and smooth the top with a spatula.
Cover the container and freeze the ice cream for at least 4 hours, or until firm.
When ready to serve, let the ice cream sit at room temperature for a few minutes to soften slightly.
Scoop the ice cream into bowls and garnish with your favorite toppings, such as chopped nuts, shredded coconut, or vegan chocolate chips.
Enjoy your creamy and delicious Chocolate Banana Ice Cream!