
Browned Fermented Butter has to be full of buttery goodness, right?!
If you’re looking for Tokyo food souvenirs to bring home to friends and family when traveling out of Japan or to another part of Japan, one great option is the Sugar Butter Sandwich Tree. With a milky sweet white chocolate filling between crispy cookies, this is a delicious treat that just about everyone loves.
Our Japanese-language reporter Yui Imai, who often works out of Taipei, is a big fan of Sugar Butter Sandwich Trees and often buys them for herself when she’s in Japan, but she recently learned some very exciting news: Haneda Airport souvenir shops sell a special, Haneda-only flavor!
They’re “Browned Fermented Butter” flavor, and they’re so popular that over 700,000 units sold in just three months. Apparently, the cookie dough is made with plentiful amounts of fermented butter from France, and the filling contains 1.3 times more chocolate than usual. Yui couldn’t help but be intrigued, so on her next pass through Haneda Airport, she decided to check the limited flavor out.
Apparently, you can find them in Tokusen Yougashikan, a souvenir shop in Terminal 1, and Tokyo Shokuhinkan in Terminal 2, which is where Yui found hers. They come in packs of four, eight, and 12, as well as in variety packs with other popular sweets. Yui bought a pack of eight for 1,296 yen (US$8.56). Apparently they stay fresh for up to three months after purchasing, so you can buy a lot and they’ll keep just fine (in case you want to stock up before your next flight).
The box is decorated with the kanji characters for Haneda Airport as well as an airplane, so there’s no mistaking that this is an airport souvenir.
Inside, eight sandwich cookies in fancy-looking golden packages were neatly lined up in the box’s bottom tray.
It looked really nice!
Yui couldn’t wait to open one up.
The cookies had a beautiful browning to them that made them look utterly delicious. The white chocolate filling inside also looked decadent.
With a snap, Yui cracked it cleanly in half. Mannn…Her mouth watered at the sight.
▼ “Itadakimasu!”
The moment it touched her tongue, a soft, buttery flavor overtook her senses. The fermented butter was so aromatic! And the milky sweetness of the chocolate only served to level it up. It was such a decadent flavor that Yui couldn’t get enough. This might be her favorite kind of Sugar Butter Sandwich Tree yet.
If someone wanted to gift these to her, she would be utterly delighted. Not only are they buttery and delicious, but they also have a sense of specialness to them, since you can only get them at Haneda Airport. If no one does buy them for her, Yui would be all too happy to buy them for herself each time she passes through Haneda Airport, and while she’s there, she’ll be sure to pick up some Sugar Butter Sandwich Tree KitKats as well!
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 ]







New Japanese KitKat flavour, Sugar Butter Tree, is like cracking a chocolate tree branch
Haneda Airport’s must-buy Japanese sweet is hard to find but worth it
Nine treats you can only get (and should get!) at Tokyo’s Haneda Airport
Exclusive piping hot baumkuchen at Haneda Airport is the delicious treat all travelers must try
Japanese vending machine at Haneda Airport serves up cute cotton candy for tourists
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Downloads of 39-year-old Guns N’ Roses song increase 12,166 percent thanks to Gundam
7-Eleven Japan sells freshly baked pizzas…but are they any good?
Japan manners debate: Is it OK to put a Mister Donut donut back on the shelf after taking it?
Three beautiful places to see Japan’s plum blossoms after starting your day in downtown Tokyo
Tsukiji Fish Market Vendor Releases Tuna For Home Assembly
Starbucks Japan releases new drinkware and goods for Valentine’s Day
The Ghibli theme park’s food looks good enough to be a reason to visit all by itself【Photos】
Does this video about an abandoned dog leave you wiping your eyes or shaking your fist?
We followed Tokyo’s mystery walking map and ended up creating our own bar-hopping adventure
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
Cherry blossom forecasts map shows Japan’s OTHER sakura season is starting right now
Yokai are descending upon Tokyo this spring in the latest immersive art experience
New Studio Ghibli stamps leave an impression on your stationery…and your heart
Japanese women sound off on their minimum height requirements for a husband【Survey】
Huge Evangelion Unit-01 head appearing in lights in Japan to celebrate anime’s 30th anniversary
Kyoto planning surprise late-night inspections of Airbnb-style rentals to fight overtourism
Family Mart releases huge range of cute sweets for Cat Day in Japan
Japan releases first official sakura cherry blossom forecast for 2026
Archfiend Hello Kitty appears as Sanrio launches new team-up with Yu-Gi-Oh【Pics】
Starbucks Japan releases new Frappuccino and latte for Valentine’s Day
China’s don’t-go-to-Japan warning looks to be affecting tourist crowds on Miyajima
Our 52-year-old pole dancing reporter shares his tips for achieving your New Year’s exercise goal
10 times to avoid traveling in Japan in 2026
Studio Ghibli releases new “komorebi” plush toys from Princess Mononoke and Spirited Away
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
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
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 Japan reveals new sakura drinkware collection, inspired by evening cherry blossoms
Updated cherry blossom forecast shows extra-long sakura season for Japan this year
Pokémon Tokyo Banana’s latest offering is adorable Pikachu and Eevee chocolate cookie sandwiches
What kind of magic happens when you put Japanese combini pastries into a hot sandwich maker?
What is a Butter Manju? We try one from this mega popular Tokyo dessert shop
The airport that’s practically a theme park — Shop, eat, play at the New Chitose Airport!
Comparing the new made-in-China Oreos to the made-in-Japan ones we knew and loved【Taste test】
Japanese cake becomes a hit with foreign tourists, but is it worth the hype?
Japanese cafe serves up fruit sandwiches like nowhere else
New spreadable French Toast from Japan is a game-changer
Leave a Reply