In a high speed blender, blend the frozen banana slices until they form a thick cream, similar to ice cream.

Add in the protein powder and blend, then add in the almond milk, a little at a time, until the bananas return to a smooth and creamy consistency. You might not need all the milk!

Stir in the chocolate chunks and walnuts. Serve immediately, or spread in a 9x5 loaf pan, and store in the freezer for later. Enjoy!