On mornings I don't have time to make my 400-calorie weight-loss smoothie, I grab a One Protein Bar in Birthday Cake ($25 for 12) for breakfast. These are also perfect to stash in my purse or gym bag after a particularly gruelling workout when I need a refuel. Each bar has 13 grams of net carbs (22 grams of total carbs) and 20 grams of protein to keep you satisfied.