This is the only way I’ve found to make anything ice cream-like without an ice cream maker: blend together 100% frozen fruit (or other frozen things) without adding any liquid or ice. And make sure you include either frozen banana or frozen avocado for the creaminess – neither of them has too strong of a flavor, so you can then use whatever you want to flavor it!
For this one I used frozen banana, frozen raspberry purée, and frozen mango purée. Yum!!