Sibby's Cupcakery

Sibby's Cupcakery No substitutes, no shortcuts—with extra smiles on top! Voted Best Party Food by Bay Area Parent and the "center of the cupcake universe" by the Bay Guardian.
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Sibby's Cupcakery is a nut-free bakery specializing in classic and custom cupcakes made the old-fashioned way: crafted from scratch and baked fresh daily, using only the finest ingredients. We've been specializing in custom cupcakes made the old-fashioned way since 2004 . Baked to order from scratch using only the finest ingredients. No substitutes, no shortcuts. With extra smiles on top.

🚨It’s LAST CALL for June flavors, y’all! 🚨Classic Yellow Cake and Lemon Meringue will be headed off to cupcake summer ca...
06/28/2026

🚨It’s LAST CALL for June flavors, y’all! 🚨Classic Yellow Cake and Lemon Meringue will be headed off to cupcake summer camp when we close today at 2pm, so hurry over and grab them before they’re gone! 💛 (Brb, need to figure out how to make cupcake summer camp a thing, because it lowkey sounds amazing).

06/27/2026

✨The viral-inspired Dot Cake Cupcakes are here!✨
Available in both chocolate and vanilla, these fun, colorful cupcakes are only here this weekend!
🏃🏻‍♀️In-store purchase only while supplies last—no holds, no preorders. Stop by and grab yours before they’re gone!
Or, if you want something a little more playful:
You’ve seen the viral Dot Cake trend... now it’s cupcake form!🧁✨

With grad season winding down, we’re so grateful to the families that have included Sibby’s Cupcakery as part of their m...
06/27/2026

With grad season winding down, we’re so grateful to the families that have included Sibby’s Cupcakery as part of their milestones over the years. ❤️ We love hearing how our cupcakes have been a part of your celebrations, whether you tell us in person or through letters, emails, photos, or drawings. This year, many of you have shared how you had Sibby’s at your child’s baby shower, and are now getting them for their high school or college graduation—we’re so honored to share in these special moments (and glad we can provide safe treats for those with nut allergies). 🥰 Thank you to all of our wonderful customers and best wishes to all graduates! 🎓

Summer is the perfect time to catch your favorite musical acts on tour! 🤘🎤🎸 What shows have you seen or want to see this...
06/26/2026

Summer is the perfect time to catch your favorite musical acts on tour! 🤘🎤🎸 What shows have you seen or want to see this summer?

This supremely satisfying summer weather has us dreaming of pool parties, complete with friends, floaties, and flip flop...
06/25/2026

This supremely satisfying summer weather has us dreaming of pool parties, complete with friends, floaties, and flip flops. ☀️👙💦 Now if you’ll excuse us, it’s time to reapply our sunscreen. 😎

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June is Men’s Mental Health Awareness Month. Here are some ways you can help, courtesy of NAMI, the National Alliance on...
06/24/2026

June is Men’s Mental Health Awareness Month. Here are some ways you can help, courtesy of NAMI, the National Alliance on Mental Illness:
💬Start a conversation. A simple conversation can spark transformation. Check in with the men in your life.
📲Share resources. Normalize seeking help by sharing information about mental health support services, hotlines, and local organizations. Let others know support is available—and that it works.
❤️Create safe spaces. Encourage environments where men feel comfortable opening up without judgment. Sometimes, just knowing it’s OK to talk makes all the difference.

Dad’s big day is here! Our signature Father’s Day decorations in store!🧁We’ve got you covered-but you have to act fast, ...
06/21/2026

Dad’s big day is here!
Our signature Father’s Day decorations in store!🧁We’ve got you covered-but you have to act fast, we close at 2pm! Stop by or give us a call. 📞

Happy Father’s Days to all the amazing fathers ❤️

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Good luck to all those running in the Presidio Half Marathon today! 🌉 May your feet be swift and your muscles strong as ...
06/20/2026

Good luck to all those running in the Presidio Half Marathon today! 🌉 May your feet be swift and your muscles strong as you take in those beautiful views of the San Francisco Bay! 💨👟

We’re honored to share that Sibby’s Cupcakery has once again been voted Best Dessert Shop in the Best of San Mateo Area ...
06/18/2026

We’re honored to share that Sibby’s Cupcakery has once again been voted Best Dessert Shop in the Best of San Mateo Area Awards! 🏆🧁
Thank you to everyone who voted, supported us, and made this recognition possible. We’re incredibly grateful to be part of such a wonderful community and to spend our days doing what we love: bringing a little joy and happiness to every customer.
A special thank you to our amazing bakery team—the creativity, care, and dedication you bring every day are what make Sibby’s so special. ❤️

Everyone loves a classic, and this June flavor is about as classic as it gets! 💛Classic Yellow Cake is rich and fluffy y...
06/18/2026

Everyone loves a classic, and this June flavor is about as classic as it gets! 💛

Classic Yellow Cake is rich and fluffy yellow cake, topped with a swirl of milk chocolate frosting and a dusting of rainbow ball sprinkles. 🌈 Perfection!

Address

716 S Railroad Avenue
San Mateo, CA
94401

Opening Hours

Wednesday 10am - 5:30pm
Thursday 10am - 5:30pm
Friday 10am - 5:30pm
Saturday 10am - 5pm
Sunday 10am - 2pm

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