High Brew Double Espresso carries more total caffeine per serving (140mg per 8 oz can vs 120mg per 6.5 oz can), but ounce for ounce Starbucks Doubleshot Espresso & Cream is actually the stronger drink at about 18mg per fluid ounce against 18. Which one "has more caffeine" depends on whether you measure the container or the concentration.
Starbucks Doubleshot Espresso & Cream vs High Brew Double Espresso: the numbers
| Starbucks Doubleshot Espresso & Cream | High Brew Double Espresso | |
|---|---|---|
| Caffeine per serving | 120mg per 6.5 oz can | 140mg per 8 oz can |
| Caffeine per fl oz | 18.5mg | 17.5mg |
| Servings to reach 400mg (FDA context) | 3.3 | 2.9 |
Sources: Starbucks Doubleshot Espresso & Cream's figure is verified in our Starbucks Doubleshot Espresso & Cream caffeine guide against Caffeine Informer / Starbucks nutrition (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 Doubleshot Espresso & Cream 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 Doubleshot Espresso & Cream: the full caffeine guide
- High Brew Double Espresso: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does Starbucks Doubleshot Espresso & Cream or High Brew Double Espresso have more caffeine? High Brew Double Espresso: 140mg per 8 oz can versus 120mg per 6.5 oz can for Starbucks Doubleshot Espresso & Cream.
Which is stronger per ounce? Starbucks Doubleshot Espresso & Cream, at about 18.5mg per fluid ounce versus 17.5mg for High Brew Double Espresso.
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.