Is this peanut er good for my protein diet?

that type of peanut er would definitely not be a good choice. the fat, and even the carbs is just too high. try looking at ideal protein (idealprotein.com) foods; to my knowledge they have some very low fat peanut er, and they also have other foods (puddings, jellos, yogourts etc.) which have a low amount of calories, as well as zero fats, zero carbs and about 18g+ of protein.