Gather all the ingredients listed above to ensure a smooth blending process.
Add 1 cup of frozen mixed berries into the blender.
Add 1/2 to 3/4 cup of your chosen milk.
Spoon in 1 to 2 tablespoons of cashew butter.
Add 1 tablespoon of chia seeds for extra nutrition.
If using, peel and add the frozen banana to the blender.
Blend on high until all ingredients are well combined and smooth.
Taste your smoothie and adjust sweetness if needed with natural sweeteners.
Pour your Whole 30 Smoothie into a glass, and enjoy immediately.