Starbucks Doubleshot Espresso & Cream carries more total caffeine per serving (120mg per 6.5 oz can vs 63mg per 1 oz shot), but ounce for ounce espresso is actually the stronger drink at about 63mg per fluid ounce against 18. Which one "has more caffeine" depends on whether you measure the container or the concentration.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
espresso vs Starbucks Doubleshot Espresso & Cream: the numbers
| espresso | Starbucks Doubleshot Espresso & Cream | |
|---|---|---|
| Caffeine per serving | 63mg per 1 oz shot | 120mg per 6.5 oz can |
| Caffeine per fl oz | 63.0mg | 18.5mg |
| Servings to reach 400mg (FDA context) | 6.3 | 3.3 |
Sources: espresso's figure is verified in our espresso caffeine guide against USDA FoodData Central (source); Starbucks Doubleshot Espresso & Cream's figure is verified in our Starbucks Doubleshot Espresso & Cream guide against Caffeine Informer / Starbucks nutrition (source).
The concentration gap is the striking part: espresso packs roughly 3 times the caffeine per ounce. Sipping speed matters at that density; a 1 oz shot finished in minutes hits differently than the same milligrams spread over a slow cup.
Which one should you pick?
Pick espresso when you want the lighter dose or a slower ramp, and Starbucks Doubleshot Espresso & Cream 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
- espresso: the full caffeine guide
- Starbucks Doubleshot Espresso & Cream: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
FAQ
Does espresso or Starbucks Doubleshot Espresso & Cream have more caffeine? Starbucks Doubleshot Espresso & Cream: 120mg per 6.5 oz can versus 63mg per 1 oz shot for espresso.
Which is stronger per ounce? espresso, at about 63.0mg per fluid ounce versus 18.5mg for Starbucks Doubleshot Espresso & Cream.
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.