To make a banana smoothie you need: A banana. It’s better to use one that’s going brown, because they’re sweeter.
And you need some soymilk. This is the kind that I buy and I like it because it doesn’t have any sugar in it or other mysterious ingredients. It just has beans. And it’s organic, and I like the package. And it tastes good.
You need a blender. It has to be a princess blender. No, I’m kidding. But I do like this princess blender.