How much caffeine is in Starbucks Caramel Ribbon Crunch Frappuccino?
A Grande (16 fl oz) Starbucks Caramel Ribbon Crunch Frappuccino has 85 mg of caffeine.
That's about one cup of brewed coffee, and 21% 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 30 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) | 60 mg | 5.0 |
| Grande shown above | 16 fl oz (473 ml) | 85 mg | 5.3 |
| Venti | 24 fl oz (710 ml) | 115 mg | 4.8 |
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 Caramel Ribbon Crunch Frappuccino by about 6:40 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 | 11:40 am | 4:40 pm | Any time |
| 10 pm | 12:40 pm | 5:40 pm | Any time |
| 11 pm | 1:40 pm | 6:40 pm | Any time |
| Midnight | 2:40 pm | 7:40 pm | Any time |
| 1 am | 3:40 pm | 8:40 pm | Any time |
For a Grande (16 fl oz) Starbucks Caramel Ribbon Crunch 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 Caramel Ribbon Crunch Frappuccino peaks in your blood about 75 minutes after you start it, at roughly 73 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 | 60 mg | 39 mg | 26 mg | 17 mg |
So one had at 3 pm leaves about 30 mg at 11 pm. How long caffeine lasts explains the curve.
How it compares
Starbucks Caramel Ribbon Crunch Frappuccino is stronger than 25% of the 90 coffee-shop drinks we track, by caffeine per serving.
Per fluid ounce (5.3 mg) it is stronger than 26% of them.
To reach 400 mg in a day you would need about 4½ of these.
Less caffeine
- Smoothie King Coffee High Protein 83 mg, 20 fl oz cup
- Starbucks Protein Matcha 75 mg, Grande hot
- Starbucks Caramel Protein Matcha 65 mg, Grande
More caffeine
- Starbucks Caramel Brulée Frappuccino 90 mg, Grande
- Starbucks Caramel Frappuccino 90 mg, Grande
- Starbucks Pistachio Frappuccino 90 mg, Grande
Same caffeine: Starbucks Banana Bread Latte.
FAQ
Is Starbucks Caramel Ribbon Crunch Frappuccino high in caffeine?
It is moderate. A Grande (16 fl oz) Starbucks Caramel Ribbon Crunch Frappuccino has 85 mg, which is 89% of the 95 mg in an 8 fl oz cup of brewed coffee.
How much caffeine is in a Tall Starbucks Caramel Ribbon Crunch Frappuccino?
A Tall (12 fl oz) Starbucks Caramel Ribbon Crunch Frappuccino has 60 mg of caffeine, 25 mg less than a Grande (16 fl oz) Starbucks Caramel Ribbon Crunch Frappuccino.
How much caffeine is in a Venti Starbucks Caramel Ribbon Crunch Frappuccino?
A Venti (24 fl oz) Starbucks Caramel Ribbon Crunch Frappuccino has 115 mg of caffeine, 30 mg more than a Grande (16 fl oz) Starbucks Caramel Ribbon Crunch Frappuccino.
Can I drink Starbucks Caramel Ribbon Crunch Frappuccino at night?
Not if you want to sleep well. Had at 7 pm, it leaves about 52 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 6:40 pm.
How long does the caffeine in Starbucks Caramel Ribbon Crunch Frappuccino last?
It peaks about 75 minutes after you start it. Of the 85 mg, about 39 mg is still in you 6 hours later and 17 mg after 12 hours, for an average adult with a 5-hour half-life.
Does Starbucks Caramel Ribbon Crunch Frappuccino have more caffeine than Red Bull?
Yes. A Grande (16 fl oz) Starbucks Caramel Ribbon Crunch Frappuccino has 85 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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