Starbucks Banana Nut Loaf Cake: calories, sugar and salt

Starbucks Banana Nut Loaf Cake contains 410 kcal per slice — 21% of the adult 2,000 kcal daily reference intake, 26% for a child aged 7 to 10, and 32% for a child aged 4 to 6. It sits between the Chocolate Swirl Loaf Cake at 401 kcal and the Pistachio White Chocolate Loaf Cake at 443 kcal among the loaf cake options. The ripe banana, walnuts and oil-based batter produce a moist, dense cake that delivers a moderate calorie count for its slice size.

Per slice: 410 kcal, 19g fat (5.2g saturated), 56g carbohydrate (32g sugar), 5.8g protein, 0.58g salt. The saturated fat at 5.2g is 26% of the adult daily guideline of 20g — the lowest of any loaf cake at Starbucks. The sugar at 32g is 107% of the adult daily free sugar limit of 30g. The salt at 0.58g is 10% of the adult daily limit of 6g.

Starbucks Banana Nut Loaf Cake contains 32g of sugar per slice — 8 teaspoons and 107% of the adult daily free sugar limit of 30g. For a child aged 4 to 6, this represents 168% of their daily free sugar limit. For a child aged 7 to 10, it is 133% of their 24g daily limit. It is the lowest sugar of the three loaf cakes at Starbucks — below the Pistachio White Chocolate at 34g and the Chocolate Swirl at 35g. The sugar comes from the caster sugar in the batter, the natural sugars in the ripe banana — which are significant as bananas become more concentrated in sugar as they ripen — and the brown sugar or muscovado used for depth of flavour. The NHS free sugar limit is 30g per day for adults, 24g for children aged 7 to 10, and 19g for children aged 4 to 6.

Starbucks Banana Nut Loaf Cake contains 0.58g of salt per slice — 10% of the adult daily limit of 6g and 19% of the daily limit for a child aged 4 to 6. Salt is moderate for a sweet bakery item and comes from the raising agents in the batter and from any salt used to balance the banana flavour. It is not a significant nutritional consideration relative to the sugar and tree nut allergen content.

Starbucks Banana Nut Loaf Cake contains 5.2g of saturated fat per slice — 26% of the adult daily guideline of 20g and 33% for a child aged 4 to 6. This is the lowest saturated fat of any loaf cake at Starbucks and among the lower saturated fat figures in the entire Starbucks sweet range. The low saturated fat reflects the oil-based batter — sunflower or rapeseed oil is high in unsaturated fats — rather than butter. Walnuts are predominantly unsaturated fat and do not contribute meaningfully to the saturated fat total. The banana itself contributes no saturated fat.

Starbucks Banana Nut Loaf Cake contains 5.8g of protein per slice — 12% of the adult daily reference intake of 50g. The protein comes from the eggs in the batter, the wheat flour and the walnuts. Walnuts contain approximately 15g of protein per 100g — one of the higher protein nuts — which contributes meaningfully to the protein total alongside the egg and flour content. At 5.8g for 410 kcal the protein-to-calorie ratio is low but slightly better than comparable cake slices without nuts.

Yes. NOVA 4, ultra-processed. The batter contains emulsifiers to improve texture and extend shelf life, modified starch as a moisture retention agent and raising agents including sodium bicarbonate and diphosphates. Banana flavouring may be used alongside real banana to intensify the flavour. These industrial additives in the batter determine the NOVA 4 classification despite the banana, walnuts, eggs and oil being recognisable food ingredients.

Starbucks Banana Nut Loaf Cake contains wheat/gluten, milk, egg, soya and tree nuts as declared allergens — five allergens. The wheat comes from the flour in the batter. The milk comes from the butter or buttermilk in the recipe. The egg comes from the whole eggs in the batter. The soya comes from emulsifiers or soya flour in the commercial recipe. The tree nuts come from the walnuts used throughout the cake. It does not contain peanuts, fish, shellfish, celery, mustard, sesame, lupin or molluscs. Anyone with a walnut or tree nut allergy must avoid this item. Always tell your barista if you have a severe allergy before ordering.

Yes. Starbucks Banana Nut Loaf Cake is suitable for vegetarians. It contains no meat or fish. It is not suitable for vegans as it contains eggs and milk. It is also not suitable for those with tree nut allergies — walnuts are present throughout the cake — or for those managing wheat, milk, egg or soya allergies.

At 32g of sugar — 168% of the daily free sugar limit for a child aged 4 to 6 — the Banana Nut Loaf Cake is not appropriate for younger children. Five declared allergens including tree nuts from walnuts significantly limit its suitability. The 5.2g saturated fat uses 33% of their daily guideline — the lowest of any loaf cake, which is a minor positive. It is not appropriate for children with nut allergies. For children, the Classic Porridge, Egg White Bites or Kettle Lightly Salted Crisps are far more appropriate choices.

Bananas are a source of potassium, vitamin B6, vitamin C and dietary fibre. Ripe bananas are also high in natural sugars — predominantly fructose and glucose — which contribute to the 32g total sugar in the loaf cake. Walnuts add omega-3 fatty acids, vitamin E and additional fibre. However, the quantity of banana and walnut relative to the total recipe weight is modest in a commercial loaf cake, and the flour, sugar and oil in the batter represent the dominant nutritional contributors. The presence of banana and walnuts gives the Banana Nut Loaf Cake a marginally better micronutrient profile than a plain sponge, but the overall nutritional picture is still dominated by sugar and refined carbohydrate.

At 32g of sugar the Banana Nut Loaf Cake already exceeds the adult daily free sugar limit of 30g before any drink is added. A plain Cappuccino or Flat White adds 9-12g from milk, taking the total to 41-44g. A Caramel Macchiato adds 23g bringing the total to 55g. A Grande Caramel Frappuccino at 48g takes the total to 80g. Only an unsweetened Americano, filter coffee or herbal tea at zero sugar is the appropriate pairing. Even a plain milk coffee pushes the daily total over the adult limit when combined with the Banana Nut Loaf Cake.

The Banana Nut Loaf Cake contains 410 kcal versus 458 kcal in the Carrot Cake — 48 fewer calories. Sugar is lower at 32g versus 44g — a significant difference of 12g. Saturated fat is lower at 5.2g versus 7.4g. Both have five allergens including tree nuts — walnuts in both cases. The Banana Nut Loaf is meaningfully better on every nutritional measure: fewer calories, less sugar and less saturated fat. If choosing between these two tree-nut-containing cakes, the Banana Nut Loaf Cake is the more nutritionally moderate option.

Starbucks Banana Nut Loaf Cake is the lowest saturated fat loaf cake at Starbucks at 5.2g and the lowest sugar of the three loaf cakes at 32g — though 32g still exceeds the adult daily free sugar limit. At 410 kcal it is mid-range. Five declared allergens including tree nuts from walnuts limit its suitability. It is suitable for vegetarians but not vegans or those with nut allergies. Compared to the Carrot Cake and Chocolate Swirl Loaf Cake it is the most nutritionally moderate loaf cake option — lower in sugar, saturated fat and calories than both alternatives. For those specifically seeking a loaf cake at Starbucks without nut allergies concerns, the Banana Nut Loaf is the best nutritional choice of the three.