Starbucks Cinnamon Bun contains 424 kcal per bun — 21% of the adult 2,000 kcal daily reference intake, 27% for a child aged 7 to 10, and 33% for a child aged 4 to 6. It sits in the mid-to-upper range of the Starbucks sweet bakery selection on calories, above the Danish pastries and muffins but below the Pistachio Scroll at 481 kcal and the All Butter Cookie at 498 kcal. The enriched yeasted dough with cinnamon sugar filling and cream cheese icing combines to produce a substantial item that is higher in carbohydrate than any other food item at Starbucks.

Per bun: 424 kcal, 15g fat (8.8g saturated), 68g carbohydrate (28g sugar), 6.4g protein, 0.78g salt. The saturated fat at 8.8g is 44% of the adult daily guideline of 20g. The sugar at 28g is 93% of the adult daily free sugar limit of 30g. The salt at 0.78g is 13% of the adult daily limit of 6g — the second highest salt of any sweet bakery item at Starbucks, after the Luxury Fruit Toast at 0.79g. The carbohydrate at 68g is the highest of any item at Starbucks.

Starbucks Cinnamon Bun contains 28g of sugar per bun — 7 teaspoons and 93% of the adult daily free sugar limit of 30g. For a child aged 4 to 6, this represents 147% of their daily free sugar limit. For a child aged 7 to 10, it is 117% of their 24g daily limit. The sugar comes from the cinnamon sugar filling layered through the dough, the cream cheese icing which is made with icing sugar, and the enriched dough itself which contains sugar as an ingredient. 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 Cinnamon Bun contains 0.78g of salt per bun — 13% of the adult daily limit of 6g and 26% of the daily limit for a child aged 4 to 6. This is the second highest salt of any sweet bakery item at Starbucks, behind only the Luxury Fruit Toast at 0.79g. The higher salt reflects the enriched yeasted bread dough format — bread doughs require salt to control yeast activity and develop gluten structure, typically at 1-2% of flour weight. The cream cheese icing also contributes sodium from the cream cheese component.

Starbucks Cinnamon Bun contains 8.8g of saturated fat per bun — 44% of the adult daily guideline of 20g and 55% for a child aged 4 to 6. The saturated fat comes from the butter used in the enriched dough and the cinnamon sugar filling, and from the cream cheese and butter in the icing. Despite the large portion size and high carbohydrate count, the saturated fat is moderate relative to butter-heavy croissants and the Lemon Tart — reflecting the bread-based rather than pastry-based construction.

Starbucks Cinnamon Bun contains 6.4g of protein per bun — 13% of the adult daily reference intake of 50g. The protein comes from the bread flour — bread flour has a higher protein content than cake flour due to the higher gluten content — and the eggs and cream cheese in the recipe. At 6.4g for 424 kcal the protein-to-calorie ratio is low. The cream cheese icing contributes some protein from the dairy content alongside its saturated fat contribution.

Yes. NOVA 4, ultra-processed. The enriched dough contains emulsifiers and dough conditioners to extend shelf life beyond a freshly baked cinnamon bun. The cream cheese icing contains stabilisers to maintain structure and prevent weeping. Glucose syrup may be used in the cinnamon filling. These industrial additives across the dough, filling and icing determine the NOVA 4 classification.

Starbucks Cinnamon Bun contains wheat/gluten, milk, egg and soya as declared allergens — four allergens. The wheat comes from the bread flour in the enriched dough. The milk comes from the butter in the dough, the cream cheese and butter in the icing. The egg comes from the eggs used to enrich the dough. The soya comes from the emulsifiers in the commercial dough recipe. It does not contain peanuts, tree nuts, fish, shellfish, celery, mustard, sesame, lupin or molluscs. Always tell your barista if you have a severe allergy before ordering.

Yes. Starbucks Cinnamon Bun is suitable for vegetarians. It contains no meat or fish. It is not suitable for vegans as it contains butter, eggs and cream cheese. With no tree nut allergen and four declared allergens it has a straightforward allergen profile among the Starbucks sweet bakery range.

At 28g of sugar — 147% of the daily free sugar limit for a child aged 4 to 6 — the Cinnamon Bun provides nearly one and a half times their entire daily free sugar allowance in a single item. The 68g carbohydrate is the highest of any item at Starbucks, representing a very large carbohydrate load for any age group. The 0.78g salt uses 26% of the daily limit for a child aged 4 to 6. It is not appropriate for younger children as a snack or treat. Four allergens with no tree nuts. For older children and teenagers it is a high-carbohydrate, moderate-protein option, but the sugar and salt levels make it unsuitable as a regular choice.

Starbucks Cinnamon Bun contains 68g of carbohydrate — the highest of any food item at Starbucks. The high carbohydrate comes from three sources: the large enriched yeasted dough which is primarily wheat flour and therefore high in starch carbohydrate, the cinnamon sugar filling layered throughout the dough which adds significant sugar carbohydrate on top of the dough starch, and the cream cheese icing which adds further sugar carbohydrate from the icing sugar content. The combination of a bread-sized portion of dough with a full complement of sweet fillings and icing produces a total carbohydrate that exceeds all cakes, muffins, pastries and sandwiches on the Starbucks menu.

At 28g of sugar the Cinnamon Bun uses 93% of the adult daily free sugar limit before any drink is added. A plain Cappuccino or Flat White adds 9-12g from milk, taking the total to 37-40g — over the adult daily limit. A Caramel Macchiato adds 23g bringing the total to 51g. A Grande Caramel Frappuccino at 48g takes the total to 76g. Only an unsweetened Americano or herbal tea at zero sugar avoids taking the combined total substantially over the daily limit. Even a plain milk coffee pushes the total over the adult daily free sugar limit when combined with the Cinnamon Bun.

The Cinnamon Bun contains 424 kcal versus 481 kcal in the Pistachio Scroll — 57 fewer calories. Sugar is similar at 28g versus 30g — both use the adult daily free sugar limit in a single item. Saturated fat is lower at 8.8g versus 12g. Protein is lower at 6.4g versus 8.5g — the pistachio content drives the Scroll's higher protein. The Cinnamon Bun has four allergens versus five in the Scroll — no tree nuts. The Cinnamon Bun is higher in carbohydrate at 68g versus 63g and higher in salt at 0.78g versus 0.62g. For lower calories and saturated fat the Cinnamon Bun is better. For higher protein and distinctive pistachio flavour the Scroll is the choice.

Starbucks Cinnamon Bun is the highest carbohydrate item at Starbucks at 68g and one of the higher salt sweet bakery items at 0.78g. The 28g sugar uses 93% of the adult daily free sugar limit. The 424 kcal and 8.8g saturated fat are moderate relative to the cakes and brownies. Four declared allergens with no tree nuts makes it more accessible than nut-containing items. It is suitable for vegetarians but not vegans. The combination of enriched dough bulk, cinnamon sugar filling and cream cheese icing makes it a substantial and distinctively flavoured item — the most carbohydrate-dense sweet bakery option on the Starbucks menu and the only cinnamon-specific item in the sweet range.