Add the frozen fruit, peanut butter + powder, cinnamon, spinach, and about a 1/2 cup of the almond milk to the blender. Blend, adding more milk, 1/2 cup at a time, until reached desired consistency and all the ingredients are well blended. Taste and add stevia if necessary.
Peel and cut the banana into chunks before freezing to ensure it blends well.
I also use peanut butter powder as it adds a more intense peanut butter flavor plus is lower in calories than regular peanut butter, If you do not have it, you can omit and use another tablespoon of regular peanut butter instead.