Put frozen bananas, almond milk, protein powder, and almond butter into the Vitamix or high speed blender.
For Vitamix, you can run on the "frozen dessert" setting. If not, I would start to blend and then increase the speed very gradually just to get it enough to blend but not turn into a smoothie. (The key to nice cream is using minimal liquid so just add a splash more if you feel like you need it given the size of the bananas.)
Serve in bowls and top with fresh berries, granola, and chocolate chips and enjoy!
Recipe by at https://www.littleadaptsbyjax.com/banana-protein-nice-cream/