Gather all your ingredients on the counter to streamline the process.
Pour 1 cup of non-dairy milk into the blender.
Add 1-2 cups of baby spinach to the blender.
Peel and break the frozen banana into chunks, and add it to the blender.
Add 1 tablespoon of peanut butter to the blender.
Add 1 teaspoon of flax seeds, 1 teaspoon of chia seeds, and 2 tablespoons of rolled oats.
Add 1/2 teaspoon of ground cinnamon, 1/2 teaspoon of vanilla extract, and a pinch of sea salt.
If desired, add a handful of ice cubes and 1 scoop of vanilla protein powder.
Blend on high until smooth and creamy, about 30-60 seconds.
Taste and adjust sweetness if needed, then pour into a glass or travel cup.
Enjoy immediately for the best flavor and texture!