Green tea powder plus milk plus syrup – sounds healthier than a latte by default, mostly because “matcha” carries this wellness-drink reputation. Check the actual sugar count, though, and a Grande Iced Matcha Latte carries 25 grams. Not nothing.
Official numbers from Starbucks put a Grande Iced Matcha Latte at 190 calories, built on milk, ice, classic syrup, and matcha powder. That matcha powder’s already pre-sweetened before it even touches the cup — worth knowing before assuming this drink’s some kind of stripped-down, sugar-free coffee alternative. Real numbers first, then where the sugar’s actually hiding. Or skip ahead and build your exact order in the Starbucks calorie calculator up top.
Iced Matcha Latte Calories by Size
Standard build, 2% milk, classic syrup included:
| Size | Calories | Sugar | Fat |
| Tall (12oz) | ~140 | ~18g | ~4g |
| Grande (16oz) | 190 | 25g | 5g |
| Venti (24oz) | ~250 | ~32g | ~7g |
Sugar scales pretty predictably with size – bigger cup, more matcha blend and syrup poured in, same pattern seen across most flavored lattes on the menu. Even a Tall carries close to 18 grams before anyone’s added anything extra.
Where the Sugar Is Actually Coming From
Two sources, and neither one’s obvious just looking at the ingredient list. Matcha itself is ground green tea, but Starbucks’ matcha blend already has sugar mixed into it before it’s even used — it’s not straight tea powder. On top of that, classic syrup goes in too – the same base sweetener used across a bunch of other drinks on the menu.
So calling this an “unsweetened” or naturally light option isn’t quite accurate. Even without any extra pumps added at the counter, the base matcha powder alone brings sweetness with it. That’s really the whole reason the sugar number climbs as high as it does for something that reads as a wellness drink.
Iced Matcha Latte with Oat Milk: Does It Change Much?
Somewhat, yeah, though maybe not the direction people expect. A Grande with oat milk instead of 2% lands somewhere around 200-240 calories depending on the exact build – actually higher in some cases, not lower. Sugar stays close to the standard version, generally 27-29 grams, since oat milk itself carries natural sugar on top of what the matcha and syrup already bring.
Oat milk wins on texture here, not calories. It’s creamier, holds up better against the grassy matcha flavor, but it’s not the lighter choice a lot of people assume it is when walking up to order.
Milk Comparison: What Actually Saves Calories
| Milk (Grande) | Calories | Sugar |
| Almond | ~150–160 | ~20g |
| Nonfat | ~170 | ~24g |
| 2% (standard) | 190 | 25g |
| Oat | ~200–240 | ~27–29g |
| Whole | ~210 | ~26g |
Almond milk’s the clear winner if calories are the priority — saves close to 30-40 calories against the standard 2% build without touching the matcha or syrup at all. That’s the swap worth making if low-calorie matcha Starbucks is actually the goal, not just a lighter-sounding order.
How to Order a Lighter Matcha Latte
A few changes bring real numbers down without losing the core flavor.
Ask for fewer pumps of classic syrup – standard Grande typically runs four pumps, and dropping to two cuts a meaningful chunk of added sugar right there. Almond or nonfat milk instead of 2% or oat trims calories further, as shown above. Some locations can build it with less matcha powder too, though that does mute the flavor and color noticeably, so it’s more of a last resort than a first move.
Combine fewer syrup pumps with almond milk, and a Grande can drop from 190 calories down to somewhere around 110-130 — genuinely closer to a “light” drink than the standard build ever gets.
FAQs
How many calories are in a Starbucks Iced Matcha Latte?
190 calories for a Grande with standard 2% milk and classic syrup, according to Starbucks’ own published nutrition data.
How much sugar is in a Starbucks Matcha Latte?
Around 25 grams for a Grande iced version, coming from both the pre-sweetened matcha blend and the classic syrup added during preparation.
Does oat milk lower the calories in an Iced Matcha Latte?
Not really, a Grande with oat milk often runs slightly higher than the standard 2% version, closer to 200-240 calories depending on the exact build.
What’s the lowest-calorie way to order a Matcha Latte?
Almond milk with fewer pumps of classic syrup brings a Grande down to roughly 110-130 calories, well below the standard build.
Is matcha actually lower in sugar than coffee-based lattes?
Not automatically. A Matcha Latte and a standard flavored coffee latte often land in a similar sugar range, since both rely on added syrup for sweetness.
Can I get an unsweetened matcha latte at Starbucks?
Not entirely, since the matcha powder blend itself contains some sugar. Skipping the classic syrup reduces sweetness but doesn’t remove sugar completely.