
Crazy hack will change the way you eat doughnuts.
You’ll find a lot of chocolates in Japan, but if you’re looking to taste one that’s achieved cult status amongst locals, you have to try a little chocolate called Black Thunder. Priced at just 35 yen (US$0.25), this palm-sized chocolate bar contains crunchy biscuit and cocoa cookie pieces that give it a wonderful flavour and satisfying crunch, earning it the number one spot in sales in the chocolate market.
The small but mighty chocolate is celebrating its 30th anniversary this year by teaming up with another giant in the sweets world, Mister Donut, for a new series of Halloween doughnuts. There are three different flavours available — chocolate, white chocolate, and strawberry — but fans have been raving about the chocolate variety, so that’s the one we picked up when we stopped by our local branch.
▼ The doughnuts are priced at 216 yen for takeout or 220 yen for dine-in.
The doughnut is said to be delicious as is, with a generous amount of familiar cookie pieces and a good crunch that contrasts with the smoothness of the doughnut.
However, some fans say it’s lacking the thunderous crunch of the chocolate bar, and to remedy that they’ve come up with a hack dubbed “Chase the Thunder“, which involves two regular Black Thunders.
▼ Simply slice open the doughnut…
▼…and place the two chocolates inside.
▼ Now you’ve made yourself the most epic doughnut ever!
Biting into this doughnut will make your jaw hurt, but for Black Thunder fans the pain will be worth it because it dials up the crunch and the chocolate, creating an intense level of flavour and deliciousness. It’s totally decadent, and works to accentuate the Black Thunder component, but if you want to save your teeth and opt for something a little lighter, the strawberry version is also highly recommended.
Black Thunder also comes in white and strawberry versions, as well as a whole load of other limited-edition flavours, so fans of the chocolate will definitely want to try all three of the new doughnuts. Only experienced Black Thunder eaters will want to try the “Chase the Thunder” hack, though, because first-timers might find it as frightening as being trapped in a thunderstorm.
However you eat the new doughnuts, though, they’re a testament to just how popular the little chocolate is in Japan — it might be small, but it even has its own line of merch and tie-up hotel rooms.
Photos © SoraNews24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]









Mister Donut’s new collection of ghost characters brings a fun new twist to Halloween
Mister Donut donuts go trick-or-treating, get Japan’s best cheap chocolate for Halloween
Limited-edition Black Thunder chocolate merch is now permanently available due to high demand
Sakura doughnuts depict life cycle of cherry blossoms at Mister Donut in Japan
Godiva x Mister Donut’s new chocolate doughnuts threaten to break our hearts this Valentine’s Day
Pokémon and Ikea Japan cross over into each other’s worlds with collaboration events
Two food hacks take Japan’s convenience store fried chicken to amazing new sandwich heights
Tokyo teahouse serves up a sakura matcha dessert you won’t find anywhere else
Japan now has a special desk for people who work at home with a pet cat[Photos]
Upcoming themed cafe answers the question “What if Hokusai had opened an eatery?”
The Sailor Moon theme song is based on another song about drinking a lot of tequila【Video】
Otaku husband returns home after argument to find wife has destroyed his anime robot collection
Muscly Japanese men fill stock photo site with hilarious poses in unusual settings
Hayao Miyazaki gifts autographed Ghibli anime cel to president of France[Photo]
Famous Tokyo cherry blossom spot installs view-blocking screens to fight overcrowding[Video]
Tokyo’s best museum for foreign travelers finally reopens after being closed for four years
Pokémon lacquerware series expands for Year of the Horse with new handcrafted design[Video]
Uniqlo announces new T-shirts for One Piece, Naruto and more for manga publisher’s 100th birthday
Picturesque Tokyo park plays host to millions of flowers and soap bubbles this spring
Tokyo subway and almost all Tokyo train lines now accepting credit card tap payments
Totoro and Calcifer become little light-up lanterns for Ghibli-style excursions or at-home decor
Fading Tokyo – Searching for signs of the Showa era as local neighborhoods evolve[Photos]
Train station platform ramen store closes its doors on half a century of history in Tokyo
Starbucks Japan releases new My Fruit³ Frappuccino at only 34 stores around the country
Studio Ghibli releases Catbus pullback keychain that runs like the anime character
Krispy Kreme releases Super Mario doughnuts in Japan for a limited time
Japanese onsen egg maker from 100-yen store Daiso needs to be on your shopping list
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
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
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
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
Mister Donut and Hello Kitty Now Serving up Cute Doughnuts!
Mister Donut makes matcha lovers swoon with new Gion Tsujiri collection
Mister Donut unveils a new type of doughnut, stuffed with two different fillings
Black Thunder becomes an epic chocolate dessert at Japanese cafe chain
Mister Donut releases a secret Godiva doughnut you won’t find in stores
New Psyduck doughnut from Mister Donut’s Pokémon collection takes head-holding to new levels
Godiva x Mister Donut collaboration adds chocolate heart doughnuts to stores for Valentine’s Day
Black Thunder grab event in Tokyo gets you a fistful of chocolate bars for less than 30 cents
Mister Donut teams up with Kyoto tea specialist for new premium matcha doughnut range
Tempura Black Thunder chocolate bars on sale in Shinjuku from now till Valentine’s Day
New Pokémon doughnuts appear at Mister Donut, including an evolved Pikachu!
Japan’s black cat Halloween donuts are so cute they require pre-orders
New Mochi Cream Doughnuts from Mister Donut pay homage to Japanese confectionery
Do Mister Donut’s sakura doughnuts taste as good as they look?
Mister Donut unveils new sakura doughnuts for cherry blossom season 2026