Freeze the banana overnight, or at least 30 minutes before cutting it into slices.
Grind rolled oats. If using old-fashioned rolled oats, optionally grind them in your blender, pulsing it for a few seconds, so you make an oatmeal flour. This will ensure you have an even creamier smoothie. If you like some grits in your smoothie, skip this step.
Blend. Add everything into a high-speed blender. If using rolled oats and prefer a creamier consistency, first pulse the oats in the blender, without any liquid, to make an "oats flour"; then add the rest of the ingredients, and blend for 40 seconds or over your blender's smoothie mode.
Serve Cold. Smoothie leftovers will keep in a covered mason jar in the refrigerator for up to 2 days, though best when fresh.
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Notes
Nutrition facts are calculated without the protein powder.Adding the suggested protein powder adds 28 calories, 0 carbohydrates, and 5 grams of protein per serving.Add agave or maple syrup for extra sweetness or extra dates. We like using dates because they have a ton of beneficial post-workout benefits.Vegan Clean Protein: if using the clean protein powder(affiliate link), add our 10% discount code OURPBWORLD10 at check-out to enjoy the benefit. (affiliate)