Starbucks Lemon Tart contains 566 kcal per tart — 28% of the adult 2,000 kcal daily reference intake, 36% for a child aged 7 to 10, and 44% for a child aged 4 to 6. It is the highest calorie single item in the entire Starbucks sweet bakery range, above the All Butter Belgian Dark Chocolate Chunk Cookie at 498 kcal and the Pistachio Scroll at 481 kcal. The combination of an all-butter pastry case, a rich butter and egg yolk lemon curd filling, and a white chocolate ganache topping drives the high calorie count.

Per tart: 566 kcal, 36g fat (24g saturated), 55g carbohydrate (35g sugar), 4.6g protein, 0.56g salt. The saturated fat at 24g is 120% of the adult daily guideline of 20g — the single highest saturated fat of any item at Starbucks. The sugar at 35g is 117% of the adult daily free sugar limit of 30g. The salt at 0.56g is 9% of the adult daily limit of 6g.

Starbucks Lemon Tart contains 35g of sugar per tart — 8.8 teaspoons and 117% of the adult daily free sugar limit of 30g. For a child aged 4 to 6, this represents 184% of their daily free sugar limit of 19g — nearly double their entire daily allowance from a single item. For a child aged 7 to 10, it is 146% of their 24g daily limit. The sugar comes from the lemon curd filling which uses caster sugar and invert sugar syrup, the white chocolate ganache which adds further sugar, and the sweet pastry case. 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 Tart contains 0.56g of salt per tart — 9% of the adult daily limit of 6g and 19% of the daily limit for a child aged 4 to 6. Despite being one of the highest calorie and highest sugar items at Starbucks, the salt is low — reflecting the sweet pastry format where salt is used only sparingly in the pastry dough and lemon curd. The salt is not a significant nutritional concern relative to the sugar and saturated fat content.

Starbucks Lemon Tart contains 24g of saturated fat per tart — 120% of the adult daily guideline of 20g and 150% for a child aged 4 to 6. This is the highest saturated fat of any item across the entire Starbucks range — food and drink combined. The saturated fat comes from three distinct sources: the butter in the sweet pastry case, the butter and egg yolks in the lemon curd filling, and the white chocolate in the ganache topping which contains cocoa butter and milk. A single Lemon Tart provides more saturated fat than the adult daily guideline allows across the full day.

Starbucks Lemon Tart contains 4.6g of protein per tart — 9% of the adult daily reference intake of 50g. The protein comes from the egg yolks in the lemon curd filling and the eggs in the pastry dough. At 4.6g for 566 kcal the protein-to-calorie ratio is the lowest of any item in the Starbucks sweet bakery range — reflecting the high fat and sugar content relative to protein-containing ingredients.

Yes. NOVA 4, ultra-processed. The white chocolate ganache topping contains soya lecithin as an emulsifier and glucose syrup — an industrially processed sweetener. The lemon curd filling contains invert sugar syrup and citric acid as an acidity regulator. The pastry case contains raising agents. These industrial additives across the ganache and filling components place the Lemon Tart in NOVA 4 despite the butter, egg and lemon base ingredients being minimally processed in themselves.

Starbucks Lemon Tart contains wheat/gluten, milk, egg and soya as declared allergens — four allergens. The wheat comes from the pastry case. The milk comes from the butter in the pastry and the milk in the white chocolate ganache. The egg comes from the egg yolks in the lemon curd and the eggs in the pastry dough. The soya comes from the soya lecithin used as an emulsifier in the white chocolate. It does not contain peanuts, tree nuts, fish, shellfish, celery, mustard, sesame, lupin, molluscs or sulphites. Starbucks prepares food in stores where all 14 major allergens are present. Cross-contamination cannot be guaranteed.

Yes. Starbucks Lemon Tart is suitable for vegetarians. It contains no meat or fish. It is not suitable for vegans as it contains butter, egg yolks and milk in the white chocolate. It is also not suitable for those with wheat, milk, egg or soya allergies.

No. Starbucks Lemon Tart is not appropriate for children. At 35g of sugar — 184% of the daily free sugar limit for a child aged 4 to 6 — it provides nearly double their entire daily free sugar allowance from a single item. The 24g of saturated fat is 150% of their daily guideline. At 566 kcal it represents 44% of the daily calorie need for a child aged 4 to 6. The four declared allergens further limit its suitability. The Lemon Tart is the most nutritionally extreme item in the entire Starbucks sweet range on sugar, saturated fat and calorie grounds.

Starbucks Lemon Tart is the highest calorie item at 566 kcal and the highest saturated fat item at 24g across the entire Starbucks range. On sugar at 35g it is among the highest but not the most extreme — the Carrot Cake at 44g and Victoria Sponge at 43g contain more sugar. The Cookie at 498 kcal and 32g sugar, the Pistachio Scroll at 481 kcal and 30g sugar, and the Almond Croissant at 425 kcal are all lower in both calories and saturated fat. The Lemon Tart's unique position is as the item that exceeds 100% of the adult daily saturated fat guideline in a single serving — no other item at Starbucks does this.

At 35g of sugar the Lemon Tart already exceeds the adult daily free sugar limit of 30g before any drink is added. Any sweetened drink alongside it pushes the total further over the limit — a Caramel Macchiato adds 23g, a Chai Tea Latte adds 28g, or a Caramel Frappuccino adds 48g. Only an unsweetened Americano, filter coffee, flat white or herbal tea adds zero sugar and limits the damage. Even with an unsweetened drink, the Lemon Tart alone exceeds the adult daily free sugar limit — making it one of the few individual food items at Starbucks that cannot be incorporated into a balanced daily sugar intake alongside any sweetened drink.

The 24g of saturated fat in the Starbucks Lemon Tart comes from three components working together. The sweet pastry case uses a high butter ratio — classic pâte sablée pastry is typically 40-50% fat by weight. The lemon curd filling is made with butter and egg yolks — the traditional lemon curd recipe uses substantial butter as a setting agent alongside the eggs, lemon juice and sugar. The white chocolate ganache on top adds further saturated fat from cocoa butter and milk in the chocolate. Each component contributes saturated fat, and their combination in a single tart pushes the total above the adult daily guideline of 20g.

Starbucks Lemon Tart is the most calorific item and the highest saturated fat item in the entire Starbucks range — including both food and drinks. At 566 kcal and 24g saturated fat it exceeds the adult daily saturated fat guideline in a single serving. At 35g sugar it exceeds the adult daily free sugar limit from a single item. It is suitable for vegetarians and has only four declared allergens. For those without dietary restrictions who enjoy lemon tart as an occasional indulgence, it is the standout choice in the Starbucks dessert range for richness and intensity — but it is the most nutritionally extreme item on the entire Starbucks menu.