Starbucks Iced Vanilla Protein Matcha Latte contains 200 kcal in a Tall (12oz), 260 kcal in a Grande (16oz) and 320 kcal in a Venti (24oz) — 10%, 13% and 16% of the adult 2,000 kcal daily reference intake respectively. It is one of the higher calorie iced drinks at Starbucks due to the protein milk base, but the calorie-to-protein ratio is one of the strongest of any drink on the menu. The matcha, vanilla flavouring and protein milk all contribute to the calorie count across sizes.

Tall (12oz): 200 kcal, 4g fat (1.5g saturated), 18g carbohydrate (12g sugar), 20g protein, 0.35g salt. Grande (16oz): 260 kcal, 5g fat (2g saturated), 24g carbohydrate (16g sugar), 27g protein, 0.46g salt. Venti (24oz): 320 kcal, 6g fat (2.5g saturated), 30g carbohydrate (20g sugar), 34g protein, 0.57g salt. The protein-to-calorie ratio is exceptional across all sizes — 20g protein for 200 kcal in a Tall is among the most efficient protein sources available at any UK high street coffee chain.

Starbucks Iced Vanilla Protein Matcha Latte contains 12g of sugar in a Tall, 16g in a Grande and 20g in a Venti — 40%, 53% and 67% of the adult daily free sugar limit of 30g respectively. The sugar comes from the matcha blend — which contains sweetened matcha powder — and the vanilla flavouring in the protein milk. It is notably lower in sugar than most sweetened Starbucks iced drinks: a Grande Iced Caramel Macchiato contains 23g, an Iced Chai Tea Latte contains 28g. 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 Vanilla Protein Matcha Latte contains 20g of protein in a Tall, 27g in a Grande and 34g in a Venti — 40%, 54% and 68% of the adult daily reference intake of 50g respectively. This is the highest protein drink at Starbucks by a significant margin. The protein comes from the specially formulated vanilla protein milk used as the base — a blend of milk proteins designed to deliver a high protein contribution per serving. A Tall delivers more protein than a standard protein bar and significantly more than any other drink on the Starbucks menu.

Starbucks Iced Vanilla Protein Matcha Latte contains approximately 55mg of caffeine in a Tall, 75mg in a Grande and 110mg in a Venti. The caffeine comes entirely from the matcha — matcha contains L-theanine alongside caffeine, which many people report produces a calmer, more sustained energy effect than the caffeine spike from espresso. For context, a Tall Starbucks Iced Caffe Latte with one shot of espresso contains approximately 75mg of caffeine. The Iced Vanilla Protein Matcha Latte delivers a moderate caffeine dose — lower than a standard espresso drink but meaningful for caffeine-sensitive individuals. The NHS advises a maximum of 200mg of caffeine per day during pregnancy.

Starbucks Iced Vanilla Protein Matcha Latte contains 1.5g of saturated fat in a Tall, 2g in a Grande and 2.5g in a Venti — 8%, 10% and 13% of the adult daily guideline of 20g respectively. The saturated fat is low across all sizes — reflecting the protein milk base which is formulated to be lower in fat than standard whole or semi-skimmed milk while maximising protein content. The matcha contributes no saturated fat.

Yes. NOVA 4, ultra-processed. The vanilla protein milk is a formulated dairy product containing isolated milk proteins, sweeteners, stabilisers and flavourings beyond what standard milk contains. The matcha blend uses a processed matcha powder with added sweetener. These are not ingredients that would be combined in home cooking — they are industrially formulated components. Despite the health positioning, the Iced Vanilla Protein Matcha Latte is a NOVA 4 product by the presence of protein isolates and stabilisers in the milk base.

Starbucks Iced Vanilla Protein Matcha Latte contains milk and soya as declared allergens. The milk comes from the vanilla protein milk base. The soya comes from soya lecithin or soya protein used as a component in the formulated protein milk blend. It does not contain wheat/gluten, egg, peanuts, tree nuts, fish, shellfish, celery, mustard, sesame, lupin or molluscs. The absence of gluten makes it suitable for those following a gluten-free diet, though Starbucks cannot guarantee cross-contamination in store. Always tell your barista if you have a severe allergy before ordering.

Starbucks Iced Vanilla Protein Matcha Latte is suitable for vegetarians. It is not suitable for vegans as the protein milk base uses dairy-derived milk proteins. The matcha itself is vegan but the vanilla protein milk component contains milk. There is no current vegan alternative to the protein milk at Starbucks that would replicate the 20g+ protein content per Tall — switching to oat or almond milk would substantially reduce the protein to a similar level as a standard matcha latte.

The Iced Vanilla Protein Matcha Latte contains caffeine from the matcha — approximately 55mg in a Tall. The NHS advises that children should avoid caffeine where possible, and the FSA recommends a maximum of 3mg of caffeine per kg of body weight per day for children. A Tall would exceed this limit for a child under approximately 18kg. The sugar at 12g in a Tall uses 63% of the daily free sugar limit for a child aged 4 to 6. The very high protein content — 20g in a Tall — is well above what a younger child would need from a single drink. The caffeine content makes it unsuitable for children and teenagers as a regular choice.

A Venti delivers 34g of protein — 68% of the adult daily reference intake — at 320 kcal. A Grande delivers 27g at 260 kcal. A Tall delivers 20g at 200 kcal. The protein-to-calorie ratio is consistent across sizes at approximately 10g protein per 100 kcal. For those primarily targeting protein intake, the Venti is the most efficient single-drink protein source at Starbucks. For those managing calorie intake while targeting protein, the Tall at 200 kcal for 20g protein is among the most calorie-efficient protein sources available at a UK coffee chain.

Both use the same vanilla protein milk base — the key difference is the flavour component. The Iced Vanilla Protein Matcha Latte uses matcha as its flavouring, delivering caffeine via L-theanine-containing matcha rather than espresso. The Iced Caramel Protein Latte uses espresso shots and caramel flavouring, delivering caffeine via coffee. Calorie, protein, sugar and saturated fat figures are similar across equivalent sizes. The matcha version delivers a calmer caffeine effect due to L-theanine; the espresso version delivers a sharper caffeine profile. For those sensitive to espresso caffeine, the Matcha version is preferable. For those who prefer a coffee flavour, the Caramel Protein Latte is the appropriate choice.

NOVA 4, ultra-processed. The vanilla protein milk base is an industrially formulated dairy product containing protein isolates, stabilisers and flavourings. The matcha blend uses processed powder with added sweetener. Despite the high protein content and fitness positioning, the formulated nature of the key ingredients — specifically the protein milk — places it in the most processed NOVA category. This does not negate the protein benefit but is relevant context for those monitoring dietary processing levels alongside nutritional targets.

Starbucks Iced Vanilla Protein Matcha Latte is the highest protein drink on the Starbucks menu at 20g per Tall, 27g per Grande and 34g per Venti. The low saturated fat across all sizes — 1.5g to 2.5g — and moderate sugar — 12g to 20g — make it one of the most nutritionally targeted drinks on the Starbucks menu for those prioritising protein intake. It contains caffeine from matcha, is not suitable for vegans or those with milk or soya allergies, and is NOVA 4. For adults who want a high-protein, moderate-sugar iced drink with the additional benefit of matcha's L-theanine alongside caffeine, the Iced Vanilla Protein Matcha Latte is the standout choice on the Starbucks menu.