Great little place, super nice staff, best slush I've ever had. Would totally recommend.

This spot used to be a different slush spot, the current business i think offers better slush. Would i come back? Definitely. Specially now that its summer read more

We've been going to once upon a slush for a few years now and it's consistently great. We really like the combo to get both the slush and soft serve. We've always gotten the brown sugar cinnamon soft serve flavor though. You can't go wrong with that one! We enjoy that the owner is great with kids and remembers the names of ours. read more

Enjoyed my passion fruit slush with vanilla soft serve combo. Small shop, opening on to an alley way. Friendly service. read more

Once Upon A Slush - Passion Fruit slush Vanilla soft serve combo. - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

Very quick service. In an out of the way place in an alley. Very good and worth it. Similar to wicked slush in Healdsburg. read more

Once Upon A Slush - Mango and toasted marshmallow combo - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

I'm sure glad the ice cream place across the street ran out of all the flavors we wanted to try because we discovered this place and it is amazing! I don't know why there aren't more reviews on this place. I don't usually give out 5*'s unless I really like the establishment and this place exceeded by expectations. I want to note this place is super clean, hidden away in a back alley off the main street, when we walked in this place was very clean and well decorated especially for Halloween! Firstly, they use Straus Cream for their soft serve! Super creamy with a silky smooth texture and decadent. We ended up getting the combo which is $12 and you choose a slush and a soft serve flavor. I would recommend getting the vanilla, which you wouldn't normally hear me say, but the machine adds this syrup/flavoring in the soft serve that isn't really my favorite. We got the sour apple slush in one and orange cream in the other with strawberry soft serve. Service here is a little on the slower side because it was the owner working the entire shop by himself orders and all, but he was super nice and friendly. This place would give meadowlark in Pleasanton a run for it's money for sure! I'd like to add that their pup cup sizes here are generous and my dogs loved it! When I'm in the area I'll be back! read more

Once Upon A Slush - Orange cream/strawberry and Sour Apple/strawberry $12 each. - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

A hidden little shop in downtown. Some ice cream or a slush, here is where to get it. Super great people, good flavors; you don't want to miss this place, especially as the hot days are coming. read more

Once Upon A Slush - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

TOASTED MARSHMALLOW SOFT SERVE!! YES!!!!!!! I loved this and will think about it every day. Until we meet again.

My granddaughter was injured today due to a faulty table. After the table flipped and hit my granddaughter in the head. The manager a loud mouth jerk named Dave began to yell at my granddaughter and refused to provide ice for her injury or do anything to assist in comforting her for her injury. This establishment is dangerous and provides a risk to children. DO NOT BRING YOUR CHILD TO THIS DANGEROUS SHOP. read more

Thanks to Yelp Elite Jamie C's review, I got the orange slush and chocolate soft serve combo and it was very yummy! The flavor combination was excellent, but I also enjoyed each flavor on its own. I got the regular size which was very generous, good for sharing. Service was fast and friendly, and we enjoyed sitting outside at the nearby plaza to listen to live music on a Sunday afternoon. read more

Once Upon A Slush - Regular chocolate soft serve and orange slush combo - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

Solid slushie and soft serve ice cream place. I think it would be more helpful to customers if they list out some pre-selected combos of slushie/soft serve + sprinkles + syrup, etc. because there were multiple times I heard people be surprised by what someone else was able to order after they had already placed or received their own order. Ambiance was clean and service seemed busy, but the wait wasn't that long. I had the soft serve ice cream and it was just okay. Another member of my party ordered a soft serve fruit flavor and we noted that it didn't actually taste all that much like the flavor she ordered. All in all, I feel like the place is very reasonable, but not something I'd go out of my way to visit if I'm looking for some sweets. read more

The slushies were very flavorful and smooth!! The ice cream was also good. I recommend the 50-50 slushie-ice cream. Owner is happy to let you sample. read more

Once Upon A Slush is a small cute shop hidden in a little courtyard. It serves, slushies, Strauss organic soft serve, coffee drinks, hot dogs, popcorn, soup, chilli, and grilled cheese sandwiches. The slushies and soft serve are the stars of Once Upon A Slush. You can even make combos or shakes of a slushy & soft serve. There are five tables for indoor seating, and two tables for outdoor seating. I came here after my husband noticed a lot of young people coming out of Once Upon A Slush. We were curious about what everyone was eating from there so we wandered in. Like a lot of customers, we ordered a combo of a slushy & a soft serve. We chose a combo of mango slushy & caramel soft serve. It was served in alternating layers of slushy and soft serve which was nice to get the change after a few bites. It was delicious and refreshing for a warm day. The mango slushy was sweet, soft, and had a lot of mango flavor. The caramel soft serve was creamy & sweet. The owner, Dave, was friendly and was a one man show. He took the orders, made the products, and served the orders. He was quick though. Once Upon A Slush is a cozy little place where one can gather with friends for coffee, slushies, soft serve, and snacks. Or just take it to go. The special treats from Once Upon A Slush are delicious and we will be back, read more

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Owner was super nice and informative. The flavors were super refreshing And not syrupy. The price was amazing for the amount we got. We can't wait to go back again. read more

Once Upon A Slush - Sour Apple and strawberry Orange cream and strawberry - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

If you haven't been to once upon a slush it's definitely an experience. It's really delicious the flavors change weekly. My favorite is chocolate slush and coffee slush. My husband's is vanilla ice cream with the orange or tangerine slush. read more

Great dessert spot in downtown Petaluma! I love walking here after a nice dinner out, it's such a fun treat. The inside is small but decorated with a cute fantasy theme, and the people working are always so friendly! Although it is located in the American Alley, so the surrounding area isn't the nicest, but I personally like to take it over to the edge of the river and enjoy it there! The four of us ordered a couple different things! I ordered a small combo with root beer soft serve and cherry slush. One thing I will note is that the depending on what flavor slush you get, it can be a little flavorless. Finding one that is good can take a little bit of trial and error! Personally, I like the cherry slush with a select few soft serve options. The root beer was very good! One of my friends ordered a kids sized combo with chocolate soft serve and orange slush. Such a delicious combination if you like orange and chocolate! It tasted just like a Jaffa Cake. The orange is also one of the better slush flavors. Another one of my friends got a kids sized toasted marshmallow soft serve with root beer slush. This tasted just like a root beer float, and will probably be my new favorite order from there! It was so yummy. The fourth friend ordered a small banana soft serve, and it tasted exactly like a banana laffy taffy (if you're into that)! Not my personal favorite but worth a try. Overall I would absolutely recommend trying this Petaluma staple at least once if you're in the area! read more

Once Upon A Slush - root beer soft serve and cherry slush! - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

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Great prices, very kind and quick service, delicious slushes with so many distinct flavors, and a very nice storefront. Easy to find while walking around in Petaluma, extremely welcoming as a place to rest and enjoy an icy treat, and great conversation with the staff. Truly a wonderful experience! read more

We ordered dipped soft serve, then were asked what size and I said a regular thinking it would be in a cone. However, we received 16 oz plastic cups full of soft serve with the top dipped in chocolate. Dipped soft serve is generally a cone. My opinion for the front of house, is to please ask cup or cone. Generally people don't want a 16 oz cup of soft serve with a little bit of chocolate dip on the top. read more

We were very excited to try this slush place this weekend. The older man working was incredibly rude, dismissive and came off very condescending when asked a simple question about the flavors. I didn't even order an item for myself after as he made the whole experience uncomfortable. He needs to work on his customer service. I am honestly surprised they have such good reviews, will not be going back. read more

This wonderful Slushy Selling Store has so much to eat! Not just because they have a whopping selection of flavors but also a variety of different types of products! Like hot dogs and soda and now coffee! Their service is so respectful and kind. Their workers put so much effort into their work. The vibe is a family vibe, they don't have that much seating. But it's so amazing to eat on the go! As a suggestion to get. Mine is Cotton Candy for the slush and Toasted Marshmallow for the ice cream part. This mix of flavors may sound weird. But the taste is wonderful! I love eating here! read more

Once Upon A Slush - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

This is an orange frozen confection with soft serve vanilla. The shop is a very small with a cool location. Never had anything like it and the quality is sensational. Many flavors of soft serve and frozen confection that can be combined all sorts of ways. The density and taste are perfect. My granddaughter and I loved it! We're going to take Dave (the owner) a copy of his place with the flying unicorn. read more

Once Upon A Slush - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

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A small ice cream and soft serve store in Petaluma. The location is a bit difficult to find it's in an alleyway. The place was pretty packed but the wait was around 5 minutes. We got the small combo and child soft serve. The child size was perfect for me the cup sizes are pretty large despite the name. The soft serve was creamy and delicious. The flavor wasn't too milky or creamy just the right taste. Definitely a place to check out! read more

Once Upon A Slush - Vanilla soft serve - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

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Soo good!!! So many flavors to pick from!! The kids will love on a hot day or just for a sweet snack! read more

Once Upon A Slush - Cherry vanilla and mango strawberry - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

This place was so fun! Formerly a Wicked Slush (if you're familiar). Dave helped us and was the most amazing host. He had us try so many samples and they were all amazing. Can't wait to go back! read more

Once Upon A Slush - Slush and soft serve w lotsa toppings! - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

The slush and soft serve were so good! There were so many options to choose from, I will definitely be coming back read more

Once Upon A Slush - Orange Cream slush with Vanilla Soft Serve and a Shirley Temple Slush with Fruity Cereal Soft Serve - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

I love the affogato! Actually, the slush. Soft serve, and coffee affogato! Amazing! Love the crappy attitude of the owner who is a comedian! A funny comedian! With crappy attitude! So funny! read more

In an alleyway off the Main Street in downtown Petaluma, we have once upon a slush. Mango ice and vanilla soft serve is my go to combo! They have like 5 sizes, but unless you're sharing I feel like a kids or regular is good enough for one person. They let you sample their 10+ flavors for those who are indecisive. read more

Delightful and wide variety of flavors! Delicious and icy cold. Great service. Refreshing as heck. We got the sour blue raspberry slushy with whipped cream. Next time we will get the orange cream :-) read more

Amazing slushy I had a mango flavor it was yummy just the right sweetness and the ice did not melt right away it's perfect for a summer heat and cool for the winter too read more

I have to start with the people who work here first, they are SO NICE! Very friendly and welcoming! I am new to the whole icey and ice cream mix combos. But I went with sour blue razz and vanilla ice cream and I have to say... it was great!! I loved it! I went with a friend and they got churro and brown sugar cinnamon she was very happy with her choice too! read more

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Ordered two different flavors - one was smooth and delicious but for some reason the other was an icy consistency and simply not enjoyable. Service was great. The counter person was super friendly and helpful. read more

This treat store is not easy to find if you are not familiar with the area. Using Google Map took us to an alley that our car could not get in. Then, we remembered that there is a public parking garage a couple blocks away. So, we parked there and walked to find this place. We were greeted by the owner. The place was well decorated and felt like a fun place to hang around; especially for kids. There were many things, including boards on the wall that the kids could play / write on / decorate. Then, of course, the sweet treats. There were many options, different ingredients/toppings, to mix and match. It is a fun activity just to choose and build our own treats. Get the creative juice flows, enjoy the yummy treats, and spend that quality parents-children time read more

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Great people. Great slush. Great Frozen Yogurt... WHAT MORE COULD YOU ASK FOR? Kid friendly! And white boards everywhere to draw and allow your inner artist to come out! read more

Once Upon A Slush - My toddler slurping up the rest of his slush/frozen yogurt - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

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Came by for the first time last weekend with my fiancé. The girl helping us was really nice, funny, and helpful explaining the menu. I ended up getting a combo of star berry slush and vanilla soft serve. It was really good! My fiancé just got a small toasted marshmallow soft serve, which surprisingly was really good. I feel like most toasted marshmallow flavored anything is too sweet but this was the perfect sweetness. We sat at their outdoor seating which was tucked in an art covered ally way. Nice little stop in Petaluma, we just love the whole area :) read more

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The owner of this place should not be in customer service! He's rude and combative with customers and resents having to serve the public. I also feel sorry for the employees having to work for him. This was the worst customer service experience I've had in Petaluma. Go to any other ice cream establishment in the area for a better experience. Skip this place altogether. read more

These treats are so good that my kid won't stop talking about them- and we just grabbed one while we were passing through! Like shave ice but better. Wish you were here in SoCal :( read more

got the toasted marshmallow soft serve and cotton candy slush, it was really good i would recommend. i was with 6 other people and all but one of them enjoyed what they ordered. the guy that works there (i'm assuming the owner) was pretty rude and impatient, thats the only thing that would deter me from going back. read more

Once Upon A Slush - Ice Cream & Frozen Yogurt Near Me - Petaluma, California

After seeing this cute spot on Localish I was determined to try it if I ever found myself in town...and it was so worth the wait. The cherry slush with chocolate-vanilla soft serve was the perfect combination! read more

First time popping into this spot and it is a great hidden gem! Reminds me of Amy's wicked slush. The flavors are great! Hope they stay open for years to come!!! read more

Yummy! Very friendly service from the young latina girl with the dry hair. Would eat again.