Starbucks Lemon Muffin contains 399 kcal per muffin — 20% of the adult 2,000 kcal daily reference intake, 26% for a child aged 7 to 10, and 31% for a child aged 4 to 6. It is the lowest calorie of the three muffins at Starbucks — below the Chocolate Muffin at 412 kcal and the Blueberry Muffin at 381 kcal, though the difference between them is small. The oil-based recipe rather than butter keeps the calorie count slightly lower than butter-based cakes of comparable size.

Per muffin: 399 kcal, 14g fat (7.2g saturated), 63g carbohydrate (34g sugar), 5.5g protein, 0.73g salt. The saturated fat at 7.2g is 36% of the adult daily guideline of 20g. The sugar at 34g is 113% of the adult daily free sugar limit of 30g. The salt at 0.73g is 12% of the adult daily limit of 6g — notably higher in salt than most sweet bakery items at Starbucks, driven by the lemon drizzle glaze.

Starbucks Lemon Muffin contains 34g of sugar per muffin — 8.5 teaspoons and 113% of the adult daily free sugar limit of 30g. For a child aged 4 to 6, this represents 179% of their daily free sugar limit — nearly double their entire daily allowance from a single muffin. For a child aged 7 to 10, it is 142% of their 24g daily limit. The sugar comes from the caster sugar in the muffin batter, the fondant icing or lemon drizzle glaze on top and the lemon curd or lemon flavouring in the filling. 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 Lemon Muffin contains 0.73g of salt per muffin — 12% of the adult daily limit of 6g and 24% of the daily limit for a child aged 4 to 6. This is the highest salt of any sweet bakery item at Starbucks — higher than the Cinnamon Bun at 0.78g — which is unusual for a lemon muffin. The salt likely comes from raising agents such as sodium bicarbonate and baking powder in the muffin batter, which contribute sodium as part of the chemical leavening process rather than from added salt as a flavouring.

Starbucks Lemon Muffin contains 7.2g of saturated fat per muffin — 36% of the adult daily guideline of 20g and 45% for a child aged 4 to 6. This is lower than most Starbucks cakes and significantly lower than the Lemon Tart at 24g, the Triple Chocolate Brownie at 16g or the All Butter Cookie at 16g. The relatively low saturated fat reflects the oil-based muffin recipe — rapeseed or sunflower oil is typically used in muffin batters rather than butter, which reduces the saturated fat while maintaining moisture and structure.

Starbucks Lemon Muffin contains 5.5g of protein per muffin — 11% of the adult daily reference intake of 50g. The protein comes from the eggs and wheat flour in the muffin batter alongside the buttermilk or yogurt which some muffin recipes use as a liquid base. At 5.5g for 399 kcal the protein-to-calorie ratio is low, typical of oil-and-sugar-led sweet bakery items where the main energy sources are fat and carbohydrate.

Yes. NOVA 4, ultra-processed. The muffin contains emulsifiers to extend shelf life and improve texture, modified starch as a moisture retention agent, raising agents including sodium bicarbonate and diphosphates, and lemon flavouring as an artificial or natural flavour extract. The fondant icing or drizzle topping contains glucose syrup — an industrially processed sweetener. These industrial additives across the batter and topping components place the Lemon Muffin in NOVA 4.

Starbucks Lemon Muffin contains wheat/gluten, milk, egg and soya as declared allergens — four allergens. The wheat comes from the wheat flour in the muffin batter. The milk comes from the buttermilk, skimmed milk powder or butter in the recipe. The egg comes from the whole eggs in the batter. The soya comes from soya flour used in the muffin recipe or the emulsifier in the topping. It does not contain peanuts, tree nuts, fish, shellfish, celery, mustard, sesame, lupin or molluscs. The absence of tree nuts makes it more accessible on allergen grounds than the Triple Chocolate Brownie. Always tell your barista if you have a severe allergy before ordering.

Yes. Starbucks Lemon Muffin 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 wheat, milk, egg or soya allergies.

At 34g of sugar — 179% of the daily free sugar limit for a child aged 4 to 6 — the Lemon Muffin is not appropriate for children. The 0.73g salt — while not extreme — uses 24% of the daily limit for a child aged 4 to 6, higher than most sweet items. The 7.2g saturated fat uses 45% of their daily guideline. Four allergens are declared. Despite the relatively lower saturated fat compared to butter-based cakes, the very high sugar content makes the Lemon Muffin unsuitable as a snack or treat for any age group of children.

The Lemon Muffin contains 399 kcal versus 412 kcal in the Chocolate Muffin and 381 kcal in the Blueberry Muffin. Sugar is 34g — between the Chocolate Muffin at 38g and the Blueberry Muffin at 30g. Saturated fat is similar across all three at 7.2g, 7.8g and 6.9g respectively. Salt at 0.73g is the highest of the three muffins. On sugar, the Blueberry Muffin is the lowest sugar option. On calories, the Blueberry Muffin is also slightly lower. For those specifically choosing between the three muffins, the Blueberry Muffin is the best choice on both calories and sugar.

At 34g of sugar the Lemon Muffin 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 43-46g. A Caramel Macchiato adds 23g, bringing the total to 57g. A Grande Caramel Frappuccino at 48g would take the total to 82g. Only an unsweetened Americano, filter coffee or herbal tea at zero sugar limits the damage. The Lemon Muffin is one of the few food items where even a plain milk coffee pushes the daily sugar total substantially over the adult daily limit.

Starbucks Lemon Muffin uses an oil-based batter rather than a butter-based one. Rapeseed oil or sunflower oil — both high in unsaturated fats — replaces the butter used in biscuits, shortbread and croissants. Oil-based muffin recipes produce a moist, open crumb texture through different chemistry than butter-based creaming methods, and the swap from saturated butter fat to unsaturated oil fat directly reduces the saturated fat content. At 7.2g it is less than half the saturated fat of the Lemon Tart at 24g and well below the butter-rich biscuits and croissants in the Starbucks range.

Starbucks Lemon Muffin sits in the mid-range of the Starbucks sweet bakery on calories at 399 kcal and lower end on saturated fat at 7.2g due to the oil-based recipe. The 34g sugar exceeds the adult daily free sugar limit and is the primary nutritional concern. The 0.73g salt is notably higher than most sweet items. It has four declared allergens and no tree nuts. It is suitable for vegetarians but not vegans. For those specifically seeking a lemon flavour in the Starbucks sweet range, the Lemon Muffin is the only lemon option alongside the Lemon Tart — and at 399 kcal versus 566 kcal it is significantly lower in calories and saturated fat than the tart, though both exceed the adult daily free sugar limit.