You can use any type of protein powder you would like. I have used vanilla, chocolate and unflavored and they all work great. Check the FAQ section in the post for ingredient substitution suggestions.
Serving: 1 muffin, Calories: 225kcal, Carbohydrates: 21g, Protein: 9g, Fat: 14g, Saturated Fat: 4g, Polyunsaturated Fat: 8g, Cholesterol: 31mg, Sodium: 289mg, Fiber: 2g, Sugar: 14g