How much caffeine is in Starbucks Iced Cream Matcha?
A Grande (16 fl oz) Starbucks Iced Cream Matcha has 55 mg of caffeine.
That's about half a cup of brewed coffee, and 14% of the 400 mg a day the FDA cites for most healthy adults.
Source: starbucks.com · checked 10 Nov 2026
Banana Bread, Banana Protein Cream, Double Berry, Lavender Cream, Mango Cream, Pumpkin Cream and Sugar Cookie Cream matchas list the same caffeine per size.
When did you have it?
Had at 3 pm, about 19 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.
Your whole day, every drink, in the free CaffeineIQ check. The iPhone app is coming soon.
Sizes
| Size | Volume | Caffeine | mg per fl oz |
|---|---|---|---|
| Tall | 12 fl oz (355 ml) | 30 mg | 2.5 |
| Grande shown above | 16 fl oz (473 ml) | 55 mg | 3.4 |
| Venti | 24 fl oz (710 ml) | 75 mg | 3.1 |
Source: starbucks.com · checked 10 Nov 2026
Latest time to drink it
For an 11 pm bedtime, a Grande (16 fl oz) Starbucks Iced Cream Matcha stays under the 50 mg most people sleep fine with, even late in the evening. The table works it out for other bedtimes and for how sensitive you are: it is the latest time to start one so that the caffeine left stays under the line all night.
| Bedtime | Very sensitive under 25 mg | Average under 50 mg | Not very sensitive under 100 mg |
|---|---|---|---|
| 9 pm | 2:50 pm | Any time | Any time |
| 10 pm | 3:50 pm | Any time | Any time |
| 11 pm | 4:50 pm | Any time | Any time |
| Midnight | 5:50 pm | Any time | Any time |
| 1 am | 6:50 pm | Any time | Any time |
For a Grande (16 fl oz) Starbucks Iced Cream Matcha, average clearance (half-life 5 h), 8 hours of sleep. "Any time" means even one at bedtime stays under the line.
How long it lasts
The caffeine from a Grande (16 fl oz) Starbucks Iced Cream Matcha peaks in your blood about 75 minutes after you start it, at roughly 47 mg. Half of it is gone in about 5 hours for an average adult; that ranges from roughly 3 to 7 hours, and longer in pregnancy or with some medicines.
| Time after | 3 hours | 6 hours | 9 hours | 12 hours |
|---|---|---|---|---|
| Still in you | 39 mg | 25 mg | 17 mg | 11 mg |
So one had at 3 pm leaves about 19 mg at 11 pm. How long caffeine lasts explains the curve.
How it compares
Starbucks Iced Cream Matcha is stronger than 11% of the 90 coffee-shop drinks we track, by caffeine per serving.
Per fluid ounce (3.4 mg) it is stronger than 11% of them.
To reach 400 mg in a day you would need about 7½ of these.
Less caffeine
- Starbucks Dragon Drink 50 mg, Grande
- Starbucks Mango Dragonfruit Refresher 50 mg, Grande
- Starbucks Pink Drink 50 mg, Grande
More caffeine
- Starbucks Dubai Chocolate Matcha 60 mg, Grande
- Starbucks Gingerbread Chai 60 mg, Grande
- Starbucks Iced Cream Chai 60 mg, Grande
Same caffeine: Starbucks Caramel Brulée Chai, Starbucks Chai Latte, Starbucks Pumpkin Spice Chai.
FAQ
Is Starbucks Iced Cream Matcha high in caffeine?
It is moderate. A Grande (16 fl oz) Starbucks Iced Cream Matcha has 55 mg, which is 58% of the 95 mg in an 8 fl oz cup of brewed coffee.
How much caffeine is in a Tall Starbucks Iced Cream Matcha?
A Tall (12 fl oz) Starbucks Iced Cream Matcha has 30 mg of caffeine, 25 mg less than a Grande (16 fl oz) Starbucks Iced Cream Matcha.
How much caffeine is in a Venti Starbucks Iced Cream Matcha?
A Venti (24 fl oz) Starbucks Iced Cream Matcha has 75 mg of caffeine, 20 mg more than a Grande (16 fl oz) Starbucks Iced Cream Matcha.
Can I drink Starbucks Iced Cream Matcha at night?
For most people, yes: even late in the evening a Grande (16 fl oz) Starbucks Iced Cream Matcha stays under 50 mg at an 11 pm bedtime.
How long does the caffeine in Starbucks Iced Cream Matcha last?
It peaks about 75 minutes after you start it. Of the 55 mg, about 25 mg is still in you 6 hours later and 11 mg after 12 hours, for an average adult with a 5-hour half-life.
Does Starbucks Iced Cream Matcha have more caffeine than Red Bull?
No. A Grande (16 fl oz) Starbucks Iced Cream Matcha has 55 mg; an 8.4 fl oz can of Red Bull has 80 mg.
Method and limits
The caffeine figure comes from starbucks.com; recipes, brewing and batches vary, so a real serving can differ. The curves use a standard one-compartment model with an average 5-hour half-life and a sleep-friendly line of 50 mg; your own body may clear caffeine faster or slower. How it works has the details.
These are estimates for information, not medical advice.
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