The nutrition of banana bread varies depending on the ingredients used. It can be as healthy or as indulgent as you'd like. Most traditional recipes make a delicious dessert that’s high in carbs, added sugar, and fat. However, this specific recipe is made with more wholesome ingredients and less fat and sugar. Each slice contains 149 calories, 31 grams of carbs, 5 grams of protein and just 1 gram of fat.