High Brew Double Espresso has more caffeine than Starbucks bottled Frappuccino (Mocha) on both counts: 140mg per 8 oz can against 105mg per 13.7 oz bottle, and about 18mg per fluid ounce against 8. The serving sizes differ, so the table below shows both ways of counting.
Starbucks bottled Frappuccino (Mocha) vs High Brew Double Espresso: the numbers
| Starbucks bottled Frappuccino (Mocha) | High Brew Double Espresso | |
|---|---|---|
| Caffeine per serving | 105mg per 13.7 oz bottle | 140mg per 8 oz can |
| Caffeine per fl oz | 7.7mg | 17.5mg |
| Servings to reach 400mg (FDA context) | 3.8 | 2.9 |
Sources: Starbucks bottled Frappuccino (Mocha)'s figure is verified in our Starbucks bottled Frappuccino (Mocha) caffeine guide against PepsiCo product facts (source); High Brew Double Espresso's figure is verified in our High Brew Double Espresso guide against Caffeine Informer (source).
Which one should you pick?
Pick Starbucks bottled Frappuccino (Mocha) when you want the lighter dose or a slower ramp, and High Brew Double Espresso when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- Starbucks bottled Frappuccino (Mocha): the full caffeine guide
- High Brew Double Espresso: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
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Gear from this guide
FAQ
Does Starbucks bottled Frappuccino (Mocha) or High Brew Double Espresso have more caffeine? High Brew Double Espresso: 140mg per 8 oz can versus 105mg per 13.7 oz bottle for Starbucks bottled Frappuccino (Mocha).
Which is stronger per ounce? High Brew Double Espresso, at about 17.5mg per fluid ounce versus 7.7mg for Starbucks bottled Frappuccino (Mocha).
Comparing caffeine? The caffeine comparison tool puts hundreds of drinks side by side, and the caffeine curfew calculator can check your cutoff time for tonight.
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