
Taking things to the extreme, but will it pay off in the end?
It’s been nearly a month since Starbucks released its latest limited-edition Frappuccino in Japan, an autumn delight called the Osatsu Butter Frappuccino. Designed to taste like a satsumaimo (baked sweet potato) slathered in butter and honey, the drink tasted moreish enough on its own, but to really impress fans, and keep them coming back for more, the chain released an official customisation for the drink on 22 September.
The customisation gives you the option to add extra Honey Butter Sauce or Imo Kenpi (fried strips of sweet potato coated with sugar), which are already used as toppings on the drink. As soon as our reporter Anji Tabata heard about it, the devilish sweet potato-loving side in her came out and sat on her shoulder, whispering into her ear, “Why don’t you take both customisations to the extreme to make it even more like a sweet potato?”
Unable to resist the devil on her shoulder, Anji headed down to Starbucks to test the limits of the customisation, and after telling the barista of her intentions to make it as much like a buttery, salty sweet potato as possible, they gave in to her request, suggesting she triple the amount of both.
Each customisation cost 49 yen (US$0.33) for takeout, after tax, so, when combined with the 678 yen cost of the drink, her total came to 976 yen.
When she received her drink, it looked like a creamy volcano had exploded on top, with an amount of toppings that was larger than anything she’d ever seen before.
▼ Behold, a Frappuccino with essentially six times more toppings than usual.
Suppressing her excitement at the look of the drink — she was in a public space after all — Anji took a sip and was immediately overcome by the deliciousness of the flavours. Honey, butter, and sweet potato all flowed into her mouth together, creating the taste of…a sweet potato topped with loads of honey and butter!!!!!
The milky Frappuccino contained bits of sweet potato in the base, which, along with the imo kenpi topping, helped to create the texture of potato. The saltiness of the fried strips of potato held up against the sweetness of the honey butter, melding together for a perfect balance of salty sweet flavours.
Though Anji had initially been concerned that the triple imo kenpi customisation would make the mix too salty, it couldn’t have been more perfect, and she found herself addicted to the flavours, sipping until the drink was completely finished, and even then she kept slurping loudly as she tried to finish every drop.
In her opinion, this extreme customisation was the perfect way to elevate the Frappuccino into one of her favourite autumn releases of all time and she highly recommends trying it. If you’d like to get a taste of the butter-slathered satsumaimo, you’ll want to get in quick, though, as it’s only on the menu, along with a selection of seasonal sweets, until 10 October.
Images © SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]




Starbucks releases a Butter Frappuccino in Japan
Starbucks Japan’s new Butter Frappuccino is more like a sweet pastry than a drink
New Frappuccino from Starbucks Japan comes filled with sweet potato fries 【Taste Test】
Starbucks Japan unveils new limited-edition Frappuccino for autumn
Do cheese and matcha go together? We find out with Starbucks Japan’s limited-time customisation
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
Cherry blossoms begin blooming in Japan with record-early starts for sakura season
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Japanese man drives truck that’s on fire directly to fire station, drops flaming potatoes[Videos]
Train station platform ramen store closes its doors on half a century of history in Tokyo
Highest Starbucks in Japan set to open this spring in the Tokyo sky
Virtual idol Hatsune Miku redesigned with look that adds new elements and brings back old ones
Sakura season arrives at McDonald’s Japan with new range of exclusive menu items
Starbucks Japan opens new Kyoto store in Place of Scenic Beauty
Universal Studios’ Sailor Moon theme park attraction is finally coming to America
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Studio Ghibli adds new Mother’s Day gift sets to its anime collection in Japan
The next time you’re feeling stressed out, you could relax on a Pokémon Psyduck chair from Japan
Komachi Shokudo: Japanese mum’s-style cooking for breakfast, lunch and dinner in Tokyo
Starbucks Japan opens new cafe and art gallery in top Tokyo tourist neighbourhood
The top 10 graduation songs in Japan as chosen by current Japanese high school students
7-Eleven Japan’s giant fried chicken skewer would be too big to eat, so it’s really for cuddling
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
Nine great places to see spring flowers in Japan, as chosen by travelers (with almost no sakura)
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Starbucks Japan releases first-ever Hinamatsuri Girls’ Day Frappuccino
Japan’s cherry blossom season predicted to start earlier than we’d thought, especially in Tokyo
Starbucks Japan releases a new Cream Puff Frappuccino for a limited time
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Japan’s newest Shinkansen has no seats…or passengers [Video]
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Starbucks unveils new Roasted Sweet Potato Frappuccino in Japan
Is Starbucks Japan’s new autumn Frappuccino better than the Tully’s Coffee tea shake?
We crunch into autumn with Starbucks Japan’s new Crispy Sweet Potato Frappuccino【Taste test】
Starbucks Japan’s latest limited-edition Frappuccino tastes better with a customisation
Sign of autumn – Japanese sweet potatoes Frappuccino appears at Starbucks Japan【Taste test】
Class is in session with Starbucks’ new college sweet potato Frappuccino【Taste test】
Starbucks unveils new Halloween Frappuccino in Japan
Starbucks adds pumpkin to its autumn Frappuccino for Halloween
Starbucks Japan goes gold with its new imo kempi sweet potato Frappuccino
New sweet potato/college potato Frappuccino joins the roster at Starbucks Japan
Does Starbucks Japan’s new Halloween Frappuccino taste as good as it looks?
Autumn arrives at Starbucks Japan with two new seasonal drinks
Starbucks Japan’s new Wimbledon Frappuccino is twice as nice with this secret customisation hack
Starbucks new CRISPY Japanese sweet potato Frappuccinos have us ready to fall in autumn love
Starbucks Japan’s Halloween Frappuccino plays tricks on the taste buds
Starbucks Japan releases new Golden Maple Candy Walnut Frappuccino with sweet dipping sticks