How much caffeine is in Starbucks Peppermint Mocha Frappuccino?
A Grande (16 fl oz) Starbucks Peppermint Mocha Frappuccino has 110 mg of caffeine.
That's about one cup of brewed coffee, and a quarter of the 400 mg a day the FDA cites for most healthy adults.
Source: starbucks.com · checked 10 Nov 2026
When did you have it?
Had at 3 pm, about 39 mg is still in you at an 11 pm bedtime. That should not affect most people’s sleep.
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Sizes
| Size | Volume | Caffeine | mg per fl oz |
|---|---|---|---|
| Tall | 12 fl oz (355 ml) | 75 mg | 6.3 |
| Grande shown above | 16 fl oz (473 ml) | 110 mg | 6.9 |
| Venti | 24 fl oz (710 ml) | 140 mg | 5.8 |
Source: starbucks.com · checked 10 Nov 2026
Latest time to drink it
For an 11 pm bedtime, most people should finish a Grande (16 fl oz) Starbucks Peppermint Mocha Frappuccino by about 4:50 pm. 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 | 9:50 am | 2:50 pm | Any time |
| 10 pm | 10:50 am | 3:50 pm | Any time |
| 11 pm | 11:50 am | 4:50 pm | Any time |
| Midnight | 12:50 pm | 5:50 pm | Any time |
| 1 am | 1:50 pm | 6:50 pm | Any time |
For a Grande (16 fl oz) Starbucks Peppermint Mocha Frappuccino, 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 Peppermint Mocha Frappuccino peaks in your blood about 75 minutes after you start it, at roughly 94 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 | 77 mg | 51 mg | 34 mg | 22 mg |
So one had at 3 pm leaves about 39 mg at 11 pm. How long caffeine lasts explains the curve.
How it compares
Starbucks Peppermint Mocha Frappuccino is stronger than 37% of the 90 coffee-shop drinks we track, by caffeine per serving.
Per fluid ounce (6.9 mg) it is stronger than 36% of them.
To reach 400 mg in a day you would need about 3½ of these.
Less caffeine
- Starbucks Mocha Frappuccino 100 mg, Grande
- Starbucks Pumpkin Spice Frappuccino 100 mg, Grande
- Dunkin' Refresher 99 mg, Medium
More caffeine
- Starbucks Tiramisu Velvet Latte 115 mg, Grande
- Starbucks Dragon Energy Drink 125 mg, Grande
- Starbucks Energy Refreshers 125 mg, Grande
FAQ
Is Starbucks Peppermint Mocha Frappuccino high in caffeine?
Yes. A Grande (16 fl oz) Starbucks Peppermint Mocha Frappuccino has 110 mg, which is 1.2 times an 8 fl oz cup of brewed coffee (95 mg).
How much caffeine is in a Tall Starbucks Peppermint Mocha Frappuccino?
A Tall (12 fl oz) Starbucks Peppermint Mocha Frappuccino has 75 mg of caffeine, 35 mg less than a Grande (16 fl oz) Starbucks Peppermint Mocha Frappuccino.
How much caffeine is in a Venti Starbucks Peppermint Mocha Frappuccino?
A Venti (24 fl oz) Starbucks Peppermint Mocha Frappuccino has 140 mg of caffeine, 30 mg more than a Grande (16 fl oz) Starbucks Peppermint Mocha Frappuccino.
Can I drink Starbucks Peppermint Mocha Frappuccino at night?
Not if you want to sleep well. Had at 7 pm, it leaves about 67 mg in an average adult at an 11 pm bedtime, above the 50 mg most people sleep fine with. The latest time for an 11 pm bedtime is about 4:50 pm.
How long does the caffeine in Starbucks Peppermint Mocha Frappuccino last?
It peaks about 75 minutes after you start it. Of the 110 mg, about 51 mg is still in you 6 hours later and 22 mg after 12 hours, for an average adult with a 5-hour half-life.
Does Starbucks Peppermint Mocha Frappuccino have more caffeine than Red Bull?
Yes. A Grande (16 fl oz) Starbucks Peppermint Mocha Frappuccino has 110 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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