We like to add some protein powder to the ingredients that get whisked, that way the protein powder gets mixed nicely into the liquid mix. Alternatively you could shake some of the almond milk with protein powder in a protein shaker to work out the lumps then add this to the mix before baking. Plus, there is peanut butter in this recipe, which is a great source of protein. You could add an additional 1 or 2 tablespoons of peanut butter when serving to increase the protein content.