I recommend using brown rice protein powder in these protein bars and my other protein bar recipes. (dessertswithbenefits.com)
I have a similar recipe but it's half the ingredients, only 1 date (I don't like it too sweet) and a serving of rice protein powder added. (deliciouslyella.com)
This means that relying on rice protein powder as your sole source of protein likely isn't a good idea. (blog.nkdnutrition.com)