Cut all the bananas into round slices and put them on a plate, take them to the freezer and leave until well frozen.
Take them out of the freezer and place half of these banana slices in a mixer or blender and add the chocolate powder. Mix very well until it combines and reaches a very creamy consistency. Transfer to a glass and serve.
To make the strawberry ice cream, add the rest of the banana slices into the mixer and add the frozen strawberries. Mix very well until very creamy.
Transfer to a glass and serve.