Starbucks Iced Matcha Tea Latte contains 170 kcal in a Tall (12oz), 210 kcal in a Grande (16oz) and 270 kcal in a Venti (24oz) — 9%, 11% and 14% of the adult 2,000 kcal daily reference intake respectively. It is lower in calories than the Iced Chai Tea Latte at equivalent sizes — a Tall Iced Matcha is 30 kcal below a Tall Iced Chai — reflecting the lower sugar content of the sweetened matcha powder versus the heavily sweetened chai concentrate. The calories come from the sweetened matcha powder and the semi-skimmed milk.

Tall (12oz): 170 kcal, 2.5g fat (1.5g saturated), 30g carbohydrate (20g sugar), 7g protein, 0.17g salt. Grande (16oz): 210 kcal, 3g fat (1.8g saturated), 37g carbohydrate (25g sugar), 9g protein, 0.21g salt. Venti (24oz): 270 kcal, 4g fat (2.4g saturated), 48g carbohydrate (33g sugar), 11g protein, 0.27g salt. All figures based on semi-skimmed milk, the Starbucks UK default. The Venti at 33g sugar exceeds the adult daily free sugar limit by 10%.

Starbucks Iced Matcha Tea Latte contains 20g of sugar in a Tall, 25g in a Grande and 33g in a Venti — 67%, 83% and 110% of the adult daily free sugar limit of 30g respectively. A Tall and Grande both stay within the adult daily free sugar limit — making the Iced Matcha Tea Latte one of the few sweetened milk drinks at Starbucks where a Tall or Grande does not exceed the daily limit on its own. The sugar comes from the sweetened matcha powder — Starbucks uses a pre-sweetened matcha blend rather than pure ceremonial grade matcha — and the naturally occurring lactose in the semi-skimmed milk. 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 Iced Matcha Tea Latte contains approximately 55mg of caffeine in a Tall, 80mg in a Grande and 110mg in a Venti. The caffeine comes entirely from the matcha powder — matcha is made from shade-grown green tea leaves ground to a fine powder, which delivers caffeine alongside L-theanine. L-theanine is an amino acid that modulates the caffeine effect, producing a calmer and more sustained energy response than espresso. A Tall at 55mg is a moderate caffeine dose — below a standard Americano at 75mg — and remains well within the NHS pregnancy maximum of 200mg at all sizes.

Starbucks Iced Matcha Tea Latte contains 1.5g of saturated fat in a Tall, 1.8g in a Grande and 2.4g in a Venti — 8%, 9% and 12% of the adult daily guideline of 20g respectively. The saturated fat is identical to the Iced Chai Tea Latte at equivalent sizes as both drinks use the same semi-skimmed milk base in the same proportions. The matcha powder contributes no saturated fat. Switching to oat milk reduces the saturated fat to near zero while maintaining the vibrant green colour and flavour profile.

Starbucks Iced Matcha Tea Latte contains 7g of protein in a Tall, 9g in a Grande and 11g in a Venti — 14%, 18% and 22% of the adult daily reference intake of 50g respectively. The protein comes from the semi-skimmed milk — the matcha powder contributes negligible protein. The protein figures are identical to the Iced Chai Tea Latte at equivalent sizes as both drinks use the same milk base proportions. At 7g protein for 170 kcal in a Tall the protein-to-calorie ratio is moderate and among the better values for a sweetened milk drink at Starbucks.

Yes. NOVA 4, ultra-processed. The matcha powder used at Starbucks is a sweetened blend containing sugar as its primary ingredient alongside matcha green tea powder — it is not pure ceremonial or culinary grade matcha. The pre-sweetened formulation with added sugar and natural flavourings classifies it as a processed ingredient beyond what a home-made matcha latte would use. The semi-skimmed milk is NOVA 2, but the sweetened matcha blend determines the overall NOVA 4 classification. Pure matcha blended with unsweetened milk would be NOVA 2 — the industrial sweetened powder format is the differentiating factor.

Starbucks Iced Matcha Tea Latte contains milk and soya as declared allergens when made with the standard semi-skimmed milk. The milk comes from the semi-skimmed milk base. The soya comes from soya lecithin used in the sweetened matcha powder blend. It does not contain wheat/gluten, egg, peanuts, tree nuts, fish, shellfish, celery, mustard, sesame, lupin or molluscs. Switching to oat or almond milk removes the dairy milk allergen — check with your barista about the specific allergen profile of the alternative milk. Always tell your barista if you have a severe allergy before ordering.

Starbucks Iced Matcha Tea Latte is suitable for vegetarians. In its standard form with semi-skimmed milk it is not suitable for vegans. Switching to oat milk or almond milk makes it vegan-compatible — the sweetened matcha powder contains no animal-derived ingredients. It is one of the most popular vegan milk drink orders at Starbucks when made with oat milk, which pairs naturally with the grassy, slightly bitter matcha flavour profile.

The caffeine content — approximately 55mg in a Tall from matcha — is the primary concern for children. The NHS advises children avoid caffeine where possible. A Tall also contains 20g of sugar — 105% of the daily free sugar limit for a child aged 4 to 6 — using just over their entire daily allowance from a single drink. While the Iced Matcha Tea Latte is lower in both sugar and caffeine than the Iced Chai Tea Latte, it is still not appropriate for younger children as a regular choice due to the caffeine and the sugar exceeding children's daily limits.

Matcha contains L-theanine alongside caffeine — a combination associated with improved focus and sustained energy without the jitteriness of coffee caffeine. Matcha also provides catechin antioxidants, particularly EGCG (epigallocatechin gallate), which research has linked to cardiovascular and metabolic health benefits. However, the matcha at Starbucks is a sweetened blend — not pure ceremonial matcha — and the quantity of actual matcha powder per serving is modest. The L-theanine and antioxidant benefit is real but diluted compared to a pure matcha preparation. The 20g of added sugar in a Tall is the dominant nutritional consideration in this format.

The primary sugar source in the Iced Matcha Tea Latte is the sweetened matcha powder — asking for fewer scoops of matcha reduces both the flavour intensity and the sugar. Each scoop of matcha contributes approximately 5-6g of sugar. Asking for one scoop rather than the standard two in a Tall reduces the sugar from approximately 20g to approximately 14-15g — keeping the total well within the adult daily free sugar limit even when paired with a plain milk coffee. The trade-off is a paler green colour and a lighter matcha flavour. There is no unsweetened matcha option currently available at Starbucks UK stores.

A Tall Iced Matcha Tea Latte contains 170 kcal and 20g sugar versus 200 kcal and 28g sugar in a Tall Iced Chai Tea Latte — 30 fewer calories and 8g less sugar. Both contain caffeine — matcha at approximately 55mg per Tall versus black tea chai at approximately 70mg per Tall. The matcha caffeine comes with L-theanine for a calmer effect; the chai caffeine comes from standard black tea without L-theanine. Saturated fat and protein are identical across sizes. For lower calories, lower sugar and gentler caffeine, the Iced Matcha Tea Latte is the better nutritional choice. For the distinctive warming spice flavour, the Iced Chai is the only option.

Starbucks Iced Matcha Tea Latte is one of the more moderate sweetened milk drinks at Starbucks — a Tall at 170 kcal and 20g sugar stays within the adult daily free sugar limit, which few sweetened milk drinks achieve. It delivers moderate caffeine with L-theanine for a calmer effect than espresso, 7g of protein per Tall from the milk and low saturated fat. Two declared allergens — milk and soya — with no tree nuts. Vegan-compatible with oat milk substitution. For adults who want a flavoured iced milk drink at Starbucks that stays within or close to the adult daily free sugar limit at Tall size, the Iced Matcha Tea Latte is among the most appropriate choices — alongside a plain Iced Caffe Latte and well below the Iced Chai Tea Latte and Iced Caramel Macchiato on sugar grounds.