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.

🍪 THE LEGEND HAS RETURNED! 🍪 It can never stay away too long 😏 Chocolate Chip Cookie Dough is back this month, and just ...
08/13/2026

🍪 THE LEGEND HAS RETURNED! 🍪 It can never stay away too long 😏 Chocolate Chip Cookie Dough is back this month, and just as delicious as you remember.

Take your tastebuds on a tropical trip to Key West, courtesy of our Key Lime Pie cupcake! 🍋‍🟩 Available this month only,...
08/08/2026

Take your tastebuds on a tropical trip to Key West, courtesy of our Key Lime Pie cupcake! 🍋‍🟩 Available this month only, it features a triple shot of key lime—in the cake, homemade curd filling, and velvet frosting—edged in toasted graham cracker crumbs. Talk about a slice of paradise! 🏝️

Where did summer go?! 🌅 San Mateo Foster City and San Mateo Union High School District schools head back to class next w...
08/07/2026

Where did summer go?! 🌅 San Mateo Foster City and San Mateo Union High School District schools head back to class next week—and building strong minds requires quality cupcake fuel. 📝 Give us a call or go online to place your back to school orders to surprise the students in your life!

We are so honored to win the Gold Medal in the category for Best Bakery for Birthday Cake or Cupcakes on the Peninsula b...
08/06/2026

We are so honored to win the Gold Medal in the category for Best Bakery for Birthday Cake or Cupcakes on the Peninsula by the readers of Bay Area Parent magazine!

Thanks to everyone who voted for us! We are so incredibly grateful for your continued and loyal support. And thank you for celebrating the local businesses, schools, camps, museums, and organizations that help make the San Francisco Bay Area such a wonderful place to call home. 💕🧁🏅

Our August Sibby’s Sampler has arrived! Flavors include:🍋‍🟩 Key Lime Pie🍫 S’mores🍪 Chocolate Chip Cookie Dough♥️ Red Vel...
08/05/2026

Our August Sibby’s Sampler has arrived! Flavors include:
🍋‍🟩 Key Lime Pie
🍫 S’mores
🍪 Chocolate Chip Cookie Dough
♥️ Red Velvet
🥕 Carrot Cinnamon
🌸 Butter Cup

08/01/2026

Thanks so much to David for stopping by a couple of weeks ago and checking out Sibbys Cupcakery!🧁
It was such a pleasure having you visit, and we truly appreciate you taking the time to support our small business. We hope you enjoyed the treats, and we can’t wait to welcome you back again soon! 💕
Outside Eats

❤️

It’s ❤️ , and she wants cupcakes. Seriously, we asked her. 🧁🧁🧁 Stop by and build a box for her that says, “Hey babe, I ...
08/01/2026

It’s ❤️ , and she wants cupcakes. Seriously, we asked her. 🧁🧁🧁 Stop by and build a box for her that says, “Hey babe, I get you.” ❤️ (Just don’t expect her to share).

💕

We’re SO ready to get our Spidey on! 🕸️ 🙌 Spider-Man: Brand New Day is now in theaters, and our custom Spider-Man cupcak...
07/31/2026

We’re SO ready to get our Spidey on! 🕸️ 🙌 Spider-Man: Brand New Day is now in theaters, and our custom Spider-Man cupcakes are the perfect way to satisfy your superhero sweet tooth! Give us a call to place your order! ❤️💙❤️💙

🚨It’s LAST CALL for July flavors, y’all! 🚨Blackberry Cobbler and Firecracker Confetti will be packing up and heading to ...
07/31/2026

🚨It’s LAST CALL for July flavors, y’all! 🚨Blackberry Cobbler and Firecracker Confetti will be packing up and heading to college (they grow up so fast! *sniff*) when we close today at 5:30pm, so hurry over and grab them before they’re gone! 👋

Mini Trader Joe’s canvas totes for the whole staff?! 😲😍 One of our amazing customers came in to the bakery recently spor...
07/30/2026

Mini Trader Joe’s canvas totes for the whole staff?! 😲😍 One of our amazing customers came in to the bakery recently sporting a Trader Joe’s mini canvas tote and we commented on how cute it was. She thanked us and told us she had them in every color...then a few weeks later, she dropped a bunch of them off as gifts to our staff! 🛍️ She TOTE-ally made our day! Thanks so much Kim for your kindness and generosity! ♥️

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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