Dunkin’ Green Apple Zero 2026: Caffeine, Calories & Flavors

Quick takeaways: Green Apple Dunkin’ Zero is a limited-time, zero-sugar energy drink with tart green apple flavor and sparkling water. According to Dunkin’, a medium has 20 calories, 0 g of sugar and 145 mg of caffeine. Plus, it launched September 30, 2026, at participating Dunkin’ restaurants while supplies last.

What Is Green Apple Dunkin’ Zero?

Green Apple Dunkin’ Zero (also written Dunkin’ Green Apple Zero) is Dunkin’s Halloween-season spin on Dunkin’ Zero, the zero-sugar energy drink the chain launched in March. Dunkin’s news release describes it as tart, crisp apple flavors combined with bubbly sparkling water.

It leads the Dunkin Halloween menu 2026. Sour Apple Energy, in fact, is the first Dunkin’ Zero drink to include cold foam, according to Dunkin’.

Green Apple Dunkin’ Zero Calories, Sugar and Carbs

A medium has 20 calories and 0 g of sugar, according to Dunkin’s product page. Sizes shift the numbers slightly, so here’s how they compare:

Medium calories come from Dunkin’s menu pages. Small and large calories, plus all carb and sodium figures, come from Dunkin’s nutrition guide, updated September 21, 2026.

Customizing the drink, however, can change these numbers. If you want to compare other orders, the Dunkin calorie calculator and Dunkin nutrition guide cover the rest of the menu.

How Much Caffeine Is in Green Apple Dunkin’ Zero?

A medium has 145 mg of caffeine, which Dunkin’ says comes from caffeine and guarana. That’s a solid dose, but how does it stack up against daily limits?

For context, the FDA cites 400 mg a day as an amount not generally associated with negative effects for most healthy adults, though it says “too much” varies by person. So one medium is a bit over a third of that. Still, caffeine affects everyone a little differently, so if you’re pregnant, on medication or managing a health condition, a quick chat with your doctor is a smart move.

What’s Inside This Zero-Sugar Energy Drink?

Dunkin’ built this one around tart, crisp green apple flavor and bubbly sparkling water. The payoff, then, is zero sugar with a real energy lift, thanks to caffeine and guarana.

A quick note for anyone with a food allergy: Dunkin’ says its products may contain, or may have come in contact with, eggs, fish, milk, peanuts, sesame, soy, tree nuts, wheat and shellfish. That’s a general notice across the menu, not a list for this drink, so our Dunkin allergen menu is a good place to start, and it’s worth telling the Dunkin’ team about any allergy when you order, as Dunkin’ itself recommends.

What Does Green Apple Dunkin’ Zero Taste Like?

Early tasters describe a tart, crisp, bubbly green apple drink:

• The apple is tart and refreshing. Reviewers describe it as tart, bubbly and refreshing, and recommend it to sour-apple fans.
• The mixes lean sweeter. Candy Kiss, for example, gets described as candy-like, more than a fall flavor.
• Sour Apple Energy is the polarizing one. One tasting found it jarringly tart, with the sourness overpowering the foam. However, another reviewer named it their favorite of the apple drinks for its mix of tart and sweet.

Order it if you like tart, fizzy, sugar-free drinks. Skip it if sour flavors aren’t your thing.

The Four Green Apple Dunkin’ Zero Drinks

Dunkin’ lists four drinks built on the green apple flavor, and its online order page shows each at 20 calories in a medium. Still, the flavors differ, as this table shows:

They join the six core flavors Dunkin’ Zero launched with on March 4, 2026, including Sunzest, a tropical mango and juicy peach blend.

Sour Apple Energy vs. the Plain Version

Sour Apple Energy pairs the green apple base with sour lemonade and tops it with Purple Marshmallow Cold Foam, the same foam on the Terror-misu Cloud Latte. However, the nutrition is nothing alike: Dunkin’s nutrition guide lists a medium at 380 calories and 48 g of sugar, against 20 calories and 0 g for the plain drink. So if zero sugar is the reason you’re ordering, stick with the plain version.

Price, Availability and How Long It Lasts

It arrived September 30, 2026, for a limited time at participating Dunkin’ restaurants, while supplies last, per Dunkin’s release. Prices, however, vary by location, so check the Dunkin’ app before you order.

Frequently Asked Questions

What is Green Apple Dunkin’ Zero?

A limited-time flavor of Dunkin’ Zero, the chain’s zero-sugar energy drink, made with tart, crisp apple flavors and sparkling water, according to Dunkin’.

How much caffeine does the green apple flavor have?

A medium has 145 mg of caffeine from caffeine and guarana, per Dunkin’s product page. That’s a bit over a third of the 400 mg a day the FDA cites for most healthy adults, but individual tolerance varies.

How many calories and how much sugar does it have?

A medium has 20 calories and 0 g of sugar. Dunkin’s nutrition guide also lists 15 calories for a small and 30 for a large, with 0 g of sugar at every size.

How long is this flavor available?

It launched September 30, 2026, for a limited time at participating restaurants while supplies last. Since availability varies by location, check with your local shop before you go.

Is it the same as Sour Apple Energy?

No. Sour Apple Energy adds sour lemonade and Purple Marshmallow Cold Foam, and a medium has 380 calories and 48 g of sugar per Dunkin’s nutrition guide.

What are the other green apple flavors?

Midnight Apple (with blackberry), Candy Kiss (with tropical mango) and Orchard Twist (with peach). Each starts with the same green apple base, but the added fruit changes the flavor.

Conclusion

Green Apple Dunkin’ Zero is the sugar-free way into Dunkin’s Halloween menu: tart, fizzy and 145 mg of caffeine in a medium. If you want something sweeter, though, Candy Kiss leans that way, while Sour Apple Energy adds sugar and cold foam.