One Protein Bar in Birthday Cake Grab a One Protein Bar in Birthday Cake ($25 for 12) if you're looking for a sweet treat that only feels indulgent. Each bar has 13 grams of net carbs (22 grams of total carbs) and 20 grams of protein to keep you satisfied. Image Source: amazon.com One Protein Bar in Birthday Cake $25 from amazon.com Buy Now