Watch this quick video to learn how to make your own low carbohydrate protein bar. Here's what you need to do to make your own low carb protein bar: Ingredients: 50 grams of hazelnut butter, 25 grams of whey protein isolate, 40ml of heavy cream Splenda (optional). Mix the butter and whey till dry. Add 40 ml cream and mix well. Shape into a bar and enjoy. This recipe has about 30 grams of protein and 3.5 grams of carbs.