You can make walnut butter by roasting double the amount of walnuts needed for the amount of butter,then blitzing until smooth (add a tsp of olive oil at a time if necessary)
The beans, protein powder and nut butter add a higher protein element.
Because freeze-dried fruits are being used, the volume needed pf the is much, much less than if using dried fruits. Also, the freeze-drying process does preserve more nutrients than off the shelf dried fruits, and you are not getting that intensified concentrated fructose hit that standard dried fruits have.
Because these granola bars contain barley and malt extract they are not considered gluten-free. There is only a small amount of rice malt syrup in this recipe.