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    Mellow Mushroom St Peters

    3.7 (329 reviews)
    ModeratePizza, Bars, New American
    Closed 11:00 am - 9:00 pm

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    MELLOW MUSHROOM ST PETERS ATMOSPHERE

    What's the vibe?
    Hipster
    Casual
    Trendy
    Moderate noise

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    Recommended Reviews - Mellow Mushroom St Peters

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    Thai Dye small pizza
    Kathy G.

    I really like Mellow Mushroom. It's one of the few places where the crust is sooo good. The pretzel bites with cheese is a great way to start off the meal. I love a good salad, and they have several to choose from. You can customize them, however you like. I've tried several different types of pizza and I really like the Holy Shiitake. The truffle sauce on top elevates it. The bar frequently offers fun events like trivia. The restaurant is a whole vibe. If you enjoyed the 80s MTV era, this place is for you.

    Bar area
    Melanie M.

    Really a fun place with great pizza at a reasonable price. We went about 4:00 on Sunday with no issue getting a table for six. We had a big booth in the dining area but there is also a large bar area with tables. The decor is bright and fun! They sell some cute T-shirts and hats too. Our waitress was great and the pizza was ready pretty quickly. The pizza has a nice thick crust and the sauce...yum! We will come again when in town.

    Trivia Night
    Nichelle O.

    Mellow Mushroom has been my family's favorite pizza place for a few years. We love the Greek salad. We usually order a regular salad and split it. You can't go wrong with the sausage, pepperoni and mushroom pizza. The crust is always amazing especially when dipped in blue cheese dressing. Every time we visit, we always get seated right away. The service is alway friendly and helpful. The place is always buzzing with patrons. Everyone is always pretty chill.

    Advertised as an Italian Hero. A slight squeeze of the bun and what little filling there is disappears.
    Kevin M.

    We took our four grandsons here for a late lunch. They were starving and we had to coax them away from Taco Bell to try something new. Mistake. The only bright spot to this visit was our server "N". She was great. The food was terrible. Three kids Mac and cheese dishes were supposed to come out early. They ended up coming out a full 10 minutes after the other dishes came out. The kids were near passing out when they dove in. Almost simultaneously, they literally spit out the food and declared "it's cold". "no way..." Sure enough I took a bite and it was totally chilled. Like... fresh out of the fridge. Now, I'm not sure what MM does to prepare fresh, steamy hot Mac and cheese, but it doesn't seem to involve fresh steamy hot Mac and cheese. I'm curious how the cooks were trained. I'm now also curious just how "freshly made" the food is. I'd also like to know why it takes longer to serve cold Mac and cheese than it does hot. As for my sammich... The filling for this "sandwich" was about 1/4 " thick. Jimmy Johns #9 is 10x's fatter, tastier, and they're cheaper. I would recommend you steer clear of Magic Mushroom until they can get some people who know how to cook in their kitchens. I wish "N" all the best. She deserves an establishment that can support her hard work with quality food.

    Holy Shiitake on GF crust
    Zee C.

    It's been years since I visited MM. Tired of the same old places, we ended up here. The two of us decided to share a couple of dishes. We selected the Stuffed Portobello and a Holy Shiitake pizza. The first dish was surprisingly tasty, warm on fresh greens and drizzled with vinaigrette. The pizza also hit the spot, and it's clear why it's so popular. The service was excellent. Our server was friendly and attentive. It was a much better experience than when we were here a few years ago. I'm certain we are going to return to try a couple more dishes. We probably won't wait four years this time!

    Half and half Pacific Rim and family favorite hamburger/black olive.
    Alan B.

    Location near the college, mall and the hustle/bustle of Mid Rivers makes this an easy destination. Fun atmosphere, great service and good food make it a go to2ce back for food and fun.

    Kosmic Karma, Funky Q Chicken

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    Food and service was excellent! Pizza was excellent and I loved the crust! Atmosphere was welcoming.

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    Page 1 of 9

    Ask the Community - Mellow Mushroom St Peters

    How do I make a reservation?

    I don't think they take reservations, but during busy times you can use Waitlist on their business page, right in the Yelp app, to get in line before you arrive.

    Is the patio dog-friendly?

    Yes! Just don't let them get your pizza!🐶

    View All 3 Questions

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    I wish I could give them 6 stars…read more Everything, and I mean everything, was completely dialed-in. From the reservation, to the hostess greeting us and helping us even though we arrived an hour early, to the desserts. The server was knowledgeable and helpful in choosing our food and drinks. It's a small menu, but clearly that allows and incredible focus on the quality and the details. I cannot imagine being unhappy with anything listed. This, for us is a special occasion place, simply because of the prices, but WORTH IT.

    We had a reservation to celebrate Valentine's Day at Noto (upstairs) for 8:30, so decided to get…read moresome appetizers at Bormio before. It was decently busy for a Wednesday night but there was plenty of bar seating. The decor is beautiful and I especially appreciated their carefully curated glass and tableware--all stunning. Our bartender, whose name I fail to remember, was excellent. She had great beer recommendations. We tried the Hefe Weissbier (my favorite, which paired perfectly with both appetizers), the Meteor Pils, and the Gaffel Kolsch. I'd recommend all of them if you're a beer drinker! The spinach dumplings are a must. They are bursting with spinach flavor and swimming in a rich brown butter sauce. We also tried the alpine dip, which comes with an enormous soft pretzel. It was okay, but the dip wasn't exactly what we were expecting. I'd probably pass on the alpine dip next time. Overall an amazing experience and I look forward to enjoying a full meal there next visit. Be advised that they pride themselves on seasonal menus so if you're eyeing a menu item, get yourself there to try it before it's gone!

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    Mellow Mushroom St Peters - pizza - Updated May 2026

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