Yes, but less than most people assume, and none of it comes from the fruit smoothies. On Jamba's current published nutrition sheet the caffeine lives in two places: the blended coffee drinks, which run 66mg to 99mg depending on size, and the 3G Energy and Green Caffeine Boost add-on, which carries 119mg on its own. Every straight fruit or veggie smoothie on the menu lists 0mg. Those figures are pulled straight from the Jamba menu and its official nutrition spreadsheet (July 2026).
Where the caffeine actually is
Jamba built its name on blended fruit smoothies, and those are caffeine-free. Strawberries Wild, Mango-A-Go-Go, Caribbean Passion, Aloha Pineapple, the whole classic wall lists zero milligrams of caffeine on the nutrition sheet. If you order one of those, you are getting sugar and fruit, not a lift.
The caffeine shows up when you move to the coffee side of the board. Jamba's two blended coffees, Buzzin' Mocha Moo'd and Coffee Dream Machine, are made with instant coffee, so they carry real caffeine. Both top out at 99mg in a large. That is roughly one strong cup of drip coffee, not the double-shot jolt some people expect from a dessert-style blended drink.
The bigger number on the menu is not a drink at all. It is the 3G Energy and Green Caffeine Boost, an add-in built from green tea leaf extract, guarana seed extract, and panax ginseng. On its own that boost lists 119mg of caffeine for 15 calories. Add it to a caffeine-free smoothie and you have turned a 0mg drink into a 119mg one without changing the flavor much.
A quick word on the internet numbers you may have seen. Older guides quote big caffeine figures for a Gotcha Matcha or a Bold n Cold Brew iced drink, sometimes north of 200mg or 300mg. Those items are not on Jamba's current published nutrition sheet, and the third-party figures floating around disagree with each other by a wide margin. I am not going to repeat a number I cannot tie to Jamba's own document. If your local store still pours a matcha or cold brew, ask them for the printed nutrition card before you trust a random total.
Jamba caffeine by drink
Verified caffeine and calories from Jamba's July 2026 nutrition spreadsheet. Caffeine is per drink as listed; the boost is an add-on you can stack onto anything.
| Item | Size | Caffeine | Calories |
|---|---|---|---|
| Buzzin' Mocha Moo'd Blended Coffee | Small | 66mg | 340 |
| Buzzin' Mocha Moo'd Blended Coffee | Medium | 66mg | 430 |
| Buzzin' Mocha Moo'd Blended Coffee | Large | 99mg | 570 |
| Coffee Dream Machine Blended Coffee | Small | 66mg | 260 |
| Coffee Dream Machine Blended Coffee | Medium | 66mg | 380 |
| Coffee Dream Machine Blended Coffee | Large | 99mg | 480 |
| 3G Energy and Green Caffeine Boost (add-on) | 1 scoop | 119mg | 15 |
| Fruit and veggie smoothies (Strawberries Wild, Mango-A-Go-Go, etc.) | Any | 0mg | varies |
The pattern is worth reading like a barista, not a customer. Small and medium blended coffees both land at 66mg because the instant coffee dose does not scale with cup size; only the large steps up to 99mg. So paying for a medium over a small gets you more sugar and volume, not more caffeine. If caffeine is the goal, the cheapest honest move is a small coffee with the Green Caffeine Boost stacked on top.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. How caffeine affects you depends on your own tolerance and health, so treat these numbers as information, not advice.
Sugar is the number that should catch your eye more than caffeine here. A large Buzzin' Mocha Moo'd carries 109g of sugar, and a large Coffee Dream Machine 90g, per the same nutrition sheet. These are blended dessert coffees first and caffeine delivery second. If you want the lift without the sugar load, the 15-calorie boost on a lighter drink does the job.
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.
How Jamba stacks up
Against a coffee shop, Jamba's caffeine is modest. A 99mg large blended coffee sits under a standard 12oz brewed coffee at most cafes, and well under an energy drink. The Green Caffeine Boost at 119mg is the one line item that reaches energy-drink territory, and it is easy to miss because it hides inside a fruit smoothie. If you hand a caffeine-sensitive person a boosted smoothie without saying so, they will feel it and not know why. Order accordingly, and tell your friend what is in the cup.
Related caffeine guides
- Smoothie King caffeine, the smoothie-chain comparison
- Panera caffeine content across the menu
- The full Barista Life caffeine database
FAQ
Do Jamba smoothies have caffeine? The standard fruit and veggie smoothies list 0mg on Jamba's nutrition sheet. They only carry caffeine if you add the 3G Energy and Green Caffeine Boost, which brings 119mg.
Which Jamba drink has the most caffeine? Among listed drinks, a large Buzzin' Mocha Moo'd or Coffee Dream Machine tops out at 99mg. The Green Caffeine Boost add-on carries more at 119mg, so a boosted drink can beat any single blended coffee.
Is Jamba coffee stronger than a regular cup? Not really. The blended coffees run 66mg to 99mg, which is around or below a typical brewed cup. They read strong because of the sugar and richness, not the caffeine.