Small unassuming store with really nice service and ambiance inside. It's cute and homey with HK music blasting which gives it such a good vibe. We ordered two puffy dogs - corn and california and a mixed egg puff. They were all really tasty and full of flavor. We also tried the HK milk tea and HK Yin Yang. Very authentic although on the lighter side for the Yin Yang. The HK milk tea is a stand out and I'll be back to try more. read more

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T Castle is located in downtown Mountain View. Parking is a bit hit or miss here, you can try your luck with street parking or park in the nearby parking garage. Small shop that may be easily missed - the interior is simple and modern, but too many flies swarming in a group in the middle of the store, which discouraged us to enjoy our drinks inside for long. Ordering is on the kiosk inside. I ordered my usual, a jasmine milk tea and a HK milk tea, since it seems like one of their speciality drinks. The jasmine milk tea was good - it had a good creaminess to it. The HK milk tea was very disappointing - it tasted bitter with a weird aftertaste to it, definitely does not taste like any HK milk tea I had before from shops in the Bay Area or even back in HK. Overall 1.5 - 2 stars, but bumped it to 3 stars just for the jasmine milk tea. read more

Came here to try their signature egg puff hot dogs and they did not disappoint! My favorite was the Corny one. Something about the sweet plump corn, creamy mayo, juicy hot dogs, and slightly sweet egg puff went so well together. Runner up was the flossy, and my friends liked the eggcellent but it was too mustard-heavy for me (I don't like mustard). Other than savory, they also had yummy sweets like the mango soft serve puffy & the oreo soft serve puffy. Such a yummy combo but the egg puffs get really soggy towards the bottom of the cup. I enjoyed the not-to-sweet drinks we got as well as the curry fish balls! This spot is fairly new in the bustling downtown mountain view area, but I can totally see it slowly become a hit. Such a good snack spot! Small with a few seats, and only two workers when we went. They were moving really efficiently! read more

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T. Castle is an interesting addition to the Mountain View boba scene, with a Taiwanese twist. The interior is bright & pretty clean, with a few seats for dine-in folks. But it's best suited for takeout. The service was also good; my orders were made on time & the staff are friendly. As far as the drinks, they are fine but don't particularly stand out in terms of quality. The Oreo Brulée Milk Tea was a bit lacking in flavor & creaminess. At least there are some unique options, like the Ovaltine Crema (which I find amusing to classify as a "tropical" flavor). The Egg Puff Waffles are the highlight for me. They are made hot & fresh. I enjoyed both the Oreo Crunch and Cheesy Puff. I don't crave waffles nearly as often as I crave milk tea, so unfortunately I don't see myself returning very often. But I think T. Castle is worth trying at least once in case you find something nice. read more

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Little walk in kiosk order type place off Castro selling tea drinks and the egg waffle hot dog as their gimmick to get you in the door. Ordered at 630 pm on a Sunday with no line and one couple in front of us. There were two people working but 15 min later still not served. I fear this place may not last in this spot very long so try it soon. CA egg waffle - served with imitation crab and mayo - the toppings did not have very much flavor so ketchup was needed - sweet sauce is hoisin but sweetened - overall pretty good but the ratio of carb to meat is off given how big the egg waffle is - should try the corn next time - self sauces available: ketchup, mustard, hoisin, sweetened soy sauce HK MT - Based on previous reviews got 50% sweet since it sounds like they're light on the sweetener syrup (this is great actually). - Flavor was like a creamier tea. Maybe a little smokier? Neither a plus or a minus, just different slightly. Oreo Soft Serve - Just a plain vanilla soft serve with Oreo crumbs and a single cookie. - Standard basis of comparison is the Mc flurry and wifey says this one tastes better so that's good. read more

T Castle - Sauces, CA dog, HK MT with lychee - Bubble Tea Near Me - Mountain View, California

I was excited that there's a new place with Hong Kong milk tea in town. Usually boba shops are from China or Taiwan, so they don't offer Hong Kong milk tea. And the Hong Kong Bistro that used to be in downtown Mountain View closed down ages ago...you get my point about the lack of HK milk tea in the boba drinks market around here. I got the iced HK milk tea with 50% sweetness. Unfortunately, the tea taste is quite subtle. The sweetness (or lack of) was just right for me, but where is my tea ... On the other hand, the dalgona coffee was excellent. It is a bit stronger than other dalgona that you'd get from Korean coffee shops. A really good kick. The egg waffle smelled so great but we didn't get any to try. Maybe I should have tried that instead of the HK milk tea... read more

Stopped by during lunch to grab an egg waffle and drink with my coworker! I believe this place took over Cafe 86 which was originally at this location, I thought the interior was very cute and would be a nice place to hang out with friends for a quick bite/drink. We ordered on a kiosk and our order came out fairly quickly. I got the Oolong Tea Crema and my coworker got the Hong Kong Milk Tea. We both enjoyed our drinks, I do wish their tea was a little stronger since I couldn't taste as much oolong as I usually do at other places. My coworker and I shared an egg waffle, we got the mixed flavored one (chocolate chip and Oreo crumbled), it's a solid egg waffle! I'm very curious about their hotdog waffle and may come back to try that. read more

T Castle - B21.HK Silky Classic Milk Tea and B26.Oolong Tea Cremaoolong - Bubble Tea Near Me - Mountain View, California

Decent new hong kong egg waffle spot with sweet and savory options, as well as multiple egg waffle wrapped asian fusion hot dog (beef franks) options. Food: - Generally enjoyed the savory egg waffle options with seaweed and pork floss, and salted duck egg you rarely see elsewhere, average egg waffle otherwise - Milky soft serve, more vanilla than milky compared to some other spots Service is a bit slow with what seems like just one guy hectically sweatshopping every order during soft opening. However, also 25% off during soft opening until end of the year 2025. Instagram: TianTianEats read more

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Summary: Okay for the area, but... Details: This little block of Mountain View continues to disappoint with its eating options, and has largely convinced me to just eat elsewhere, given the choice of meet-up locations with South Bay friends. T Castle is yet another milk tea shop addition to the area, and to their credit, they're probably even one of the better options, while also offering up a smattering of other food options that you won't find elsewhere, like egg waffle hot dogs, and soft service. That said, if you're looking for good milk tea, and don't mind going 10-20 minutes north or south, you'll have much better drink choices with, say, Molly Tea. But if you insist on something within walking distance after eating in the neighborhood, again, they aren't the worst choice, with tea drinks that have decent tea notes, and aren't overly sweet. Their default non-dairy creamer isn't great though, so you're better off with one of the real or alt-milk options. Their egg waffles are on the denser and less crisp side, and their soft serves are all the same milk/vanilla base, but served with different types of toppings. Unsurprisingly, the brown sugar boba was way too sweet for me, but it was hard telling how much of that was from the brown sugar vs the soft serve itself (I think it was a bit of both). Also, as mentioned by some other reviewers, they might still be figuring out some of the kinks since opening, as our orders also had mistakes in them (i.e. boba in the no-boba milk tea my friends ordered) Realistically, probably a three star for those in the area, but for someone as far as myself with better options in-between, I can't see myself coming back. Accessibility: Small cafe with not much seating in general, but a couple of which are accessible. Space itself is pretty spacious and easy to get around, and you order from a tablet kiosk like in many other similar places these days. read more

T Castle - Bubble Tea Near Me - Mountain View, California

Service and ambiance are nice but overall disappointed with the food Tried the matcha pineapple wit boba it was ALL pineapple Also tried hong kong silky milk tea - at 50% sweet it was not sweet at all it tasted like 0% sweet Boba was hard and not really as chewy as it could be . I tried the Oreo waffle and the Boba waffle and the Boba waffle had too much Boba in it and the Oreo waffle was fine, but it wasn't anything amazing. in fact I like Happy Lemon waffles, significantly more in terms of crispiness and sweetness. Overall, this reminds me of a new Boba place that it opened up like 10 years ago but compared to the regular Bay Area standard for Boba nowadays I don't think this lives up to the mark I would recommend going to Ume or Happy Lemon next-door. read more

Decided to stop by because I was in the area and I was enticed by the egg waffles. It's a rather cute little shop with some seats inside and a very minimal layout. Lots of variety on the menu though from savory and sweet egg waffles to various teas, smoothies, and so on. I ordered the Hong Kong silky tea and the jasmine green tea with crema. I ordered 50% sweetness because that's what I usually do at every milk tea shop but I would not recommend doing that here unless you don't like your drinks sweetened at all. The tea flavors were great for both drinks nonetheless, especially the Hong Kong milk tea! It's not often that I come by a shop that sells this drink so I was glad to see it on their menu. As for the egg waffles, I got the original and the salted egg flavors. They're very soft on the inside, wished they were a bit more crispy on the outside but they both had a nice subtle sweetness and egg flavor. The salted egg flavor had small bits of the egg yolk throughout the waffle which was interesting but I think it could've used a little more salted egg overall. I believe they're in their soft opening stage right now so all menu items were 25% off which runs until Dec 31st if I'm not mistaken. Service was a bit slower because it was just one person but I didn't mind waiting and they were nice. Would like to come back and try the other drinks! read more

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Came here to try some hot dogs fusion with egg puff waffles. They did not disappoint. My favorite was the California since it was like a mix between a street hot dog with the onions and mayo and California roll with the masago and crab imitate. Super flavorful. And their egg puff was fluffy on the inside and crispy on the outside. Also got So Hot as the other savory and their Strawberry cream puff ice cream for dessert. I also got a Red Guava Crema for a drink but forgot to take a picture of it since that's how good their hot dogs were. Not even sure if I should be calling them hotdogs. Inside is nice and cute and the service was quick. read more

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Fun spot for drinks and egg waffles. They have a variety of egg waffle options both sweet and savory. We tried the corny hot dog egg waffle which includes a large hot dog, corn, cheese, and drizzled with mayo I think? read more

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Have gone many times myself and always bring more people back when I visit again. Highly recommend if you want to snack on something while walking around down town! read more

Walk in only one person working, small store about 4 tables. We order in the kiosk because she seems to be busy. Egg puff are a little sweet and no very crispy a little too chewy. We put no onion but the hot dog has too much onion, even on the box it says no onion. Hot dog itself is good not very salty. We also ordered Hong Kong milk tea and lemon tea with grapes but didnt take pictures because it didn't come until we finished. Employee also didn't call us to pick up after drinks on counter. read more

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Castle is such a hidden gem, and their egg puff hot dogs are the real standout. The combo is surprisingly amazing crispy, fluffy egg puff on the outside with a juicy, savory hot dog inside. It's the perfect balance of sweet, savory, and crunchy, and honestly way more addictive than I expected. What makes it even better is how interesting and unique the concept is. It's not something you see everywhere, and T Castle absolutely nails it. Freshly made, fun to eat, and totally different from your typical snack. If you're into trying creative food combinations, this is a must. I'll definitely be coming back just for the egg puff hot dogs alone. Highly recommend checking it out if you're in Mountain View and ask for to make the drink! She does a cute little dance when she shakes the drinks. read more

We've passed by this place and finally decided to try it. I'm glad we did and we've already gone back a second time. For tea, I had the tropical lemon and found it refreshing. I'm not sure what my husband had but he enjoyed it as well. We also tried their Hong Kong dog "sandwich" and the second time a California puff dog. Both were delicious. There are several more for us to try :) They have a weekday lunch special where you get a dog and drink of your choice for just $13.95. Quite the bargain with the way prices are going everywhere. The hard part, deciding which to try next time. read more

Summary: slow service, incomplete order, bad boba. Slow Service I visited today, Saturday, and completed ordering at the kiosk about 11:35 am. I only ordered a milk tea with boba and an original egg waffle. I didn't get my complete order until about 12:20 pm. That is truly ridiculous. Yes, there were a few other customers in the shop too and they too kept checking with the staff about their orders so the slow service wasn't unique to me. I wouldn't say it was super busy to be about 45 minutes slow. Incomplete Order I think I got my milk tea about 30 minutes into my 45 minute wait. It took another 15 minutes to get my egg waffle. That's ridiculous. Bad Boba The boba was hard. Yuck. Of all the places you can get milk tea and egg waffles in downtown Mountain View, T Castle needs to be on the bottom of the list! read more

T Castle has the kind of menu that usually gets me excited. Egg puff waffles and fruit teas are a classic combo, so I stopped in hoping for a quick snack fix. I ordered through the self-service kiosk and got two egg puff waffles: the original and the cheese. Unfortunately both missed the mark. The cheese waffle barely had any noticeable cheese flavor. If I didn't know it was supposed to be cheese, I probably wouldn't have guessed. The bigger issue was the texture. A good Hong Kong egg waffle should be crispy on the outside and chewy on the inside. These came out soft, soggy, and floppy with almost no crisp at all. Both the original and cheese had the same problem, so the waffles just felt flat and lacked that satisfying bite. I also tried the wintermelon lemon drink, but that one was a bit off too. The lemon left a noticeable bitter aftertaste which made the drink less refreshing than expected. The shop itself is pretty simple. There are a few seats if you want to sit down and eat, but nothing particularly memorable about the space. It still feels like a newer spot and they seem to be figuring things out. The order also took a little longer than expected even though it wasn't very busy. Overall it wasn't a terrible visit, just not the egg waffle experience I was hoping for. With better crispiness and some tweaks to the drinks, this place could definitely improve. read more

I absolutely loved the red guava tropical crema! The guava flavor stood out and the crema was tasted slightly salted. The egg puff were also slightly crispy which we loved and we love the idea of egg puff having a savory or sweet option. Theres also a self menu check out. read more

Nice ambiance with a cozy, welcoming feel. I really loved the plants throughout the space--they added a fresh, relaxing touch and made it a pleasant place to sit and enjoy our drinks. The location was a little hard to find at first since it's right next to another boba shop, but once inside, it was definitely worth it. The boba was good and well made, with a nice balance of flavor and sweetness. Ordering was easy and convenient thanks to the self-service computer system, which made the process quick and straightforward. We also tried the bubble waffle, and it was delicious--crispy on the outside and soft on the inside. Overall, it was a fun spot with good drinks, tasty treats, and a relaxed atmosphere. I'd definitely come back and recommend it to anyone looking for a chill boba place read more

Cozy place. Love the mango sago came with the mango popping boba, what a plus. Puff dog looks great, will try next time read more

T Castle - Mango Sago & Hong Kong Milktea - Bubble Tea Near Me - Mountain View, California

Drove by this cozy place couple of times and finally stop by and give it a try. This place does not disappoint! This drink I've got, virgin pina colada tastes just like the original but without alcohol. I also saw their menu has a egg puff corn dog, will definitely come back and try that! read more

T Castle - Virgin Piña Colada - Bubble Tea Near Me - Mountain View, California

The bubble waffles, drinks, and soft serve are delicious! They have a wide variety of egg waffles (savory and sweet), and their soft serve is really good, and different than other places (you just have to taste it to find out). Service is good, and the owner is really nice. The ambiance is a light, inviting mood. They also have free wifi here so you can work here (like you would in a cafe!). If you do get the milk teas though (I got the jasmine green milk tea), I would recommend 100% sweetness, as the teas aren't that sweet to begin with. 10/10 Would recommend! read more

T Castle - Front Kiosk - Bubble Tea Near Me - Mountain View, California

Really impressed with this spot! The eggette is amazing, crispy on the outside, soft and fluffy inside. It's the best I've had lately, and the original favor is a must-try. They have other flavors too! The milk tea is also excellent, with a real Hong Kong style taste. I recommend 50% sweetness. You can also request it hot, which is perfect for HK style milk tea lovers and great for winter. The eggette and milk tea together make the perfect combo. read more

The staff are super friendly. I ordered the HK Silky Classic Milk Tea and Mango Sago, they both taste delicious! Will definitely become my regular from now on! read more

T Castle - Bubble Tea Near Me - Mountain View, California

House milk tea (hot, 50% sugar) was very smooth, just like the milk tea from HK, Puffy Yaki dog was super yummy too! read more

T Castle - B21.HK Silky Classic Milk Tea X2. Puffy Yaki - Bubble Tea Near Me - Mountain View, California

This is a small little store down in Mountain View, has a nice vibe and interesting Eggette options! Would recommend to try it out.