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.

*Cue Christopher Cross megahit of 1979* ⛵ SAAAIIIIILLLLIIIIIIINGGGG...is the perfect activity for this gorgeous weather!...
09/06/2026

*Cue Christopher Cross megahit of 1979* ⛵ SAAAIIIIILLLLIIIIIIINGGGG...is the perfect activity for this gorgeous weather! This custom sailing order is sending us straight to yacht rock heaven. ⚓ W**e cooler, anyone?

⛵️



September’s Monthly Mashup is Choco Dulce—a decadent dreamscape of dulce de leche and chocolate for the sophisticated sw...
09/04/2026

September’s Monthly Mashup is Choco Dulce—a decadent dreamscape of dulce de leche and chocolate for the sophisticated sweet tooth.🧐Featuring chocolate cake filled with dulce de leche and topped with dulce frosting (and a dulce drizzle for good measure), it’s one flavor you don’t want to miss!





Our September Sibby’s Sampler has arrived! Flavors include:🍌 Banana Cream Pie⚫ Cookies ‘n Cream🍪 Chocolate Chip Cookie D...
09/03/2026

Our September Sibby’s Sampler has arrived! Flavors include:
🍌 Banana Cream Pie
⚫ Cookies ‘n Cream
🍪 Chocolate Chip Cookie Dough
♥️ Red Velvet
🥕 Carrot Cinnamon
🎉 Confetti Surprise





09/03/2026

Thank you, David, for stopping by and showing your continued support. Your support means more than you know, and we’re grateful to have you as part of our community. ❤️
Thank you for always showing up and being there for us!



❤️

🚨It’s LAST CALL for August flavors, y’all! 🚨Key Lime Pie and S’mores are off to their retirement village, where they’ll ...
08/30/2026

🚨It’s LAST CALL for August flavors, y’all! 🚨Key Lime Pie and S’mores are off to their retirement village, where they’ll play bingo, drive golf carts, and take in the early bird dinner specials at 4pm—until next year. Grab ‘em before we close today at 2pm!





Congratulations to Dawn Olson-Bunker-Brewer the winner of our Sibby’s Sampler giveaway for August!🥳🎉Please give us a cal...
08/29/2026

Congratulations to Dawn Olson-Bunker-Brewer
the winner of our Sibby’s Sampler giveaway for August!🥳🎉

Please give us a call to schedule a pickup date and time to collect your prize.☎️
Thanks to everyone who entered - we’ll do another giveaway in September!

We have a great selector of cupcakes for sale in store and are open today until 5 pm!




08/28/2026

Gotta bake ‘em all! 🧁⚡️ These Pokémon cupcakes are ready to battle your sweet tooth ,made fresh today in honor of Pokémon Worlds taking over the city! Come catch yours before they’re all gone.

This weekend only — call or stop by to place an order!




👀SIBBY’S SIGHTING!👀Well, this escalated quickly.😂🧁One minute this little Sibby’s plushie is out shopping...and the next ...
08/27/2026

👀SIBBY’S SIGHTING!👀

Well, this escalated quickly.😂🧁

One minute this little Sibby’s plushie is out shopping...and the next it’s riding sh***un with a GIANT capybara behind the wheel. 🚗 💨

Where has YOUR little cupcake been? Take your plushie along for the adventure, snap a pic and send it our way or tag us with we can’t wait to see where these cuties turn up next!
📸💕

Don’t have a custom Sibby’s plushie yet? Swing by the bakery and pick up your very own!🧁💕




“🎁IT’S GIVEAWAY TIME!🎁The winner of our August giveway gets double prizes: a Sibby’s Sampler Box (that’s 12 mini cupcake...
08/26/2026

“🎁IT’S GIVEAWAY TIME!🎁
The winner of our August giveway gets double prizes: a Sibby’s Sampler Box (that’s 12 mini cupcakes, 2 of each of our 6 sampler flavors, with our classic signature decorations) ✨PLUS✨ a Sibby’s plushie! All you need to do is follow these 4 steps:

📲Follow us on Instagram or Facebook

❤️Like this post

🔖Tag a friend on this post

Tell us where you’d keep your plushie if you won!
Where will YOU take your Sibby’s plushie? ❤️

Comment below 👇

The flavors for this month are:
🍋‍🟩 Key Lime Pie
🍫 S’mores
🍪 Chocolate Chip Cookie Dough
♥️ Red Velvet
🥕 Carrot Cinnamon
🌸 Butter Cup

We’ll announce the winner soon. Stay tuned!





Born from the smoldering embers of the last bonfire of summer, we present to you...for one final appearance this year......
08/23/2026

Born from the smoldering embers of the last bonfire of summer, we present to you...for one final appearance this year...S’MORES! 🙌 Yes, it’s back for August, but then it really IS taking its delectable graham cracker cake, Hershey’s chocolate center, and gooey toasted marshmallow frosting back to the firepit from whence it came 😆 Say a fond farewell to the summer of 2026 with one last taste, available through August 31st! 🏕️🍫




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

Website

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