Raspberry-Kefir Power Smoothie

Love this recipe! I really don't like protein powder for smoothies but hard to get a good flavor without. This fills me up all morning. I think the key is the frozen banana, but I also use frozen fruit for the berries too. I also will switch it up with frozen blueberries, strawberries or blackberry. As long as you follow the proportion of the recipe the peanut butter isn't overpowering. I use whole flax seeds vs flaxmeal. The blender grinds it all up nice and small.