It's sweet, it's green and it's fluffy. How a Swedish princess cake became an online obsession.

What's green, spongy, has a raspberry jam filling and hails from Sweden? A Swedish princess cake, of course! Beloved for its playful, pastel-green color and perfectly domed shape, the dainty confection — also known as prinsesstårta — has become a social media sensation after TikTokers learned that Trader Joe's just unveiled its own version.

"OK, breaking news — I just found out Trader Joe's is doing a princess cake, and I haven't even got it yet. I had no idea this was a thing… Somebody posted this, I thought it was AI," a TikToker named Samantha said in a recent video, which has garnered nearly 26,000 likes. "Umm, apparently it's real. The only complaint that I already have is why is it limited time? Because I feel like if it's good, I'm gonna cry when I can't get this."

What has the internet hooked on this cake? And why does it look so familiar? Here's what to know about the fairytale-like dessert drawing attention to Trader Joe's freezers.

Trader Joe's unveiled its "Swedish Princess Raspberry Cake" in late September. The 18-ounce dessert costs $7.99 and comes in a pretty pink box featuring an image of the cake on a white platter. The Trader Joe's princess cake, per the dessert's online description , is made "by experts in Sweden" and will be available in stores from now through the end of the year.

"It's a traditional domed confection that features two layers of airy sponge cake sandwiching a thin layer of tart-sweet raspberry jam and rich pastry cream," reads the dessert's description. "On top of this is a lusciously thick dome (we mean thick!) of whipped cream, with the entire Cake draped in stunning, pastel-green marzipan that's accented with thin white stripes. There's really nothing quite like this combination, either in look or in taste!"

News that Trader Joe's unveiled a freezer-friendly version of the cake spread fast. On TikTok, several happy customers have shared videos of themselves unboxing and trying the princess cake for the first time.

Rachel, a content creator who goes by @eatsbyrachel on TikTok, posted her taste test video on Wednesday. She said IKEA previously released its own princess cake, though "it was a complete miss" when she tried it. (One redditor claimed the IKEA version was " sickly sweet " for their palate.)

"It defrosted pretty nicely, and we have clean layers of cream, cake and raspberry jam," Rachel said. "The cream is perfectly light and fluffy, and the raspberry jam kind of cuts through it. And the marzipan layer on the outside isn't too thick, which I appreciate… and the cake itself is also really light and fluffy."

Lily Beez, another content creator, also shared her review of the Trader Joe's dessert on Wednesday.

"TJ's, I'm impressed," Beez said after taking her first bite. "The cream is definitely very fluffy and light. You can absolutely taste the raspberry. The marzipan isn't too thick and gloopy either. Overall, for $8, this is a great find. I feel like it would be really cute for somebody's birthday with just one singular candle in the middle."

Its connection to 'The Great British Bake Off'

If the viral cake looks familiar, that's because it is. Fans of The Great British Bake Off may remember seeing the Swedish princess cake in a Season 5 episode titled "European Cakes." During the episode's technical challenge, judge Mary Berry asks the six bakers to recreate her complicated, 24-step recipe for the showstopping green cake in less than three hours.

The Swedish princess cake also has royal ties. Jenny Åkerström, the author and home economics teacher credited with inventing the cake, taught Swedish princesses, Margaretha, Märtha and Astrid, the daughters of Prince Carl, Duke of Västergötland, in the early 20th century. A recipe for the cake appeared in a later edition of Åkerström's cookbook, Prinsessornas kokbok or Cookbook of the Princesses . The now-viral dessert was originally known as "green cake" or grön tårta, but was renamed "princess cake" or prinsesstårta because the princesses were said to have loved it.

So why is a frozen Trader Joe's dessert charming the internet? And is the hype even warranted? Beyond its novelty as a limited-edition sweet treat, the TJ's Swedish princess cake is a whimsical confection that seems to bring people joy. On Reddit , users have shared their excitement over the traditional Swedish dessert. Many associate it with beloved family members and nostalgic childhood memories.

"Oh my god. This is literally my favorite dessert in the entire world," a redditor commented . "It evokes in me a Proustian sense memory of eating it as a child any time I somehow manage to get it, but those occasions are few and far between."

Another added , "There was a Swedish bakery, Crown bakery in Worcester, MA for over fifty years. They made Princess cakes, Swedish coffee cake rings. The rolled out fondant, covering the whole cake. Many times visiting family, they would either have a Swedish coffee cake or Princess cake. Fond memories of delicious desserts."

For others, its appeal is far simpler. As one Reddit user put it , "Call me a basic b, but you put princess in the name and my inner child wants it (also I love custard)."