Costco cake hack to save money for any party theme

Justine Young lifestyle blogger shares her favorite Costco cake hack.

Table of Contents

When I shared my favorite Costco cake hack on my InstaStories I got a much bigger response than I expected. With three more birthdays coming up soon I thought now would be the perfect time to share this cake hack. If you missed it keep reading for a simple Costco cake hack. It will will save you lots of money when feeding a crowd!

Justine Young lifestyle blogger shares her favorite Costco cake hack.

I should start with a disclaimer that I’m not positive that this will work at any Costco. Some locations might not be as flexible in their bakery department. However, I’ve been able to request a “custom” cake at several different locations, so it will probably work for you. I’m going to walk you through the steps of what I do when I’m ordering a Costco cake that I’m planning to “decorate” myself.

Justine Young lifestyle blogger shares her favorite Costco cake hack.

how to customize your Costco cake

ordering your cake

Let me just say, our family loves Costco cake! If you’re a Costco member than you’re probably aware that they do have quite a few designs to choose from. However, sometimes they don’t have quite what you’re going for. I also actually prefer the scored cake (with the lines piped on) rather than a design. I find that it’s much easier to cut pieces that are the right size if the cake is scored.

Employees have told me that you need to be very specific with what you want if it varies from their standard choices. So when you’re filling out the order form don’t be afraid to write out what you want! When I’m ordering I put a check mark on the form next to “scored flowers”. I also cross out the word “flowers”. Then where it asks you for the colors you want I write “N/A” and “Just scored, no flowers”.

Justine Young lifestyle blogger shares her favorite Costco cake hack.

decorating a Costco cake

Then I can decorate each individual square however I want! For my daughter’s Frozen party in January I used sprinkles and cupcake rings that I ordered off of Amazon. This gave her the Elsa cake she wanted in an affordable (and easy) way. I’ve also used chocolate molds and colored melting wafers to make seashells that went with a swimming birthday party. I’ve even used graham cracker crumbles and marshmallows to decorate a chocolate frosted Costco cake for a camping party!

Justine Young lifestyle blogger shares her favorite Costco cake hack.

Normally, you would probably spend at least twice as much for a cake of this size. However, with this Costco cake hack it’s an easy and affordable way to have a personalized cake!

Or just a ordinary Friday night. No, just me?

Where do you like to get your cakes from?

60 Responses to Costco cake hack to save money for any party theme

  1. Sarah @ Foxy's Domestic Side April 2, 2018 at 4:55 am #

    Wow, that is a great idea! I love it! Never would have thought to do this. I’m sure most Costco’s would accommodate this, not too hard to do less work for them!

  2. jessica lynn April 2, 2018 at 6:55 am #

    Well, isn’t that genius! I remember your hack story and was kicking myself for not paying more attention to it or taking notes. lol i should’ve just asked you, because when it came time to order our cake, I couldn’t remember what you did.

    Seriously though, aren’t Costco cakes the best? SO good and so cheap! Pinning so i won’t forget about this next year!

  3. Jenny April 2, 2018 at 8:28 pm #

    Costco cakes are the best! Who doesn’t love them? 🙂

  4. Mary Leigh April 3, 2018 at 11:25 am #

    This is such a great idea! Perfect for birthday parties and events! Thanks for sharing!

  5. Tiffanie Anne April 3, 2018 at 6:30 pm #

    This is amazing!! What a great way to save some money but still personalize your cake! Also, I think Costco cakes are so yummy!

  6. Raina April 3, 2018 at 7:55 pm #

    Well this is genius! Such a great idea and looks way better!

  7. Veronika April 3, 2018 at 10:06 pm #

    We always bake our cakes at home. Well only not when I need a piece for the shooting my picnics.
    Veronika
    https://brunettefromwallstreet.com

  8. Theresa Bailey April 4, 2018 at 4:21 am #

    This is actually genius! I got a spiderman cake for my son and it had blue and black icing. Not really what I wanted and it was super messy. Plus all that food coloring! I will never do that again. I will try this instead.

  9. Amanda Martin April 4, 2018 at 6:28 am #

    Good to know! Cake is my weakness, I just can’t say no!

    • Eva Dickson June 5, 2021 at 6:40 pm #

      Awesome idea! Let me share my Costco cake hack. For our wedding on the cheap, we ordered two Costco cakes, a choco with choco mousse and a white with vanilla mousse, both with just the piped border. I took both and overlapped the cake boards, long side to long side and butted both cakes right next to each other. I added a pillar and a nicer bakery cake for the topper right in the center. I decorated all with fresh flowers, covering the seam. Imagine our guests surprise when we cut into the cake and they had a choice of two flavors in “one” cake!!

  10. Heather April 4, 2018 at 7:38 am #

    This is genius! My sons’ birthday is this month and I think I’ll give this a try!

  11. Adree April 4, 2018 at 12:52 pm #

    I love this idea. Such an easy way to have a custom cake. And since I’m always at costco anyway it’s easy pick up 🙂

  12. Holly @ Mimi's Dollhouse April 4, 2018 at 9:02 pm #

    Cool…this is a great hack! I usually get a grocery store cake to decorate, but they are much smaller. Love this.

  13. Elle May 15, 2018 at 5:01 pm #

    So theyll do a chocolate cake with white buttercream? Thought you could only do white with white, and choc with choc. Will have to ask!

    • Justine @ Little Dove May 21, 2018 at 10:42 pm #

      Some locations might not do whatever you want, but every location I’ve tried it at has let me! Just ask someone in the bakery department to confirm before you place your order. 🙂

  14. Suzanne September 26, 2018 at 11:29 am #

    This is brilliant! Perfect for any large crowd.

  15. Galina September 29, 2018 at 10:12 am #

    Awesome idea! Could you please tell me how many squares there are or how many rings you used? Thanks!

    • Justine @ Little Dove September 29, 2018 at 8:54 pm #

      Hi! I believe there are 48 squares on a Costco sheet cake! And I think the rings I ordered from Amazon came in a 48 pack as well. Hope that helps!

      • Galina October 4, 2018 at 8:52 am #

        Thank you so much! Would 1.25” round rings work?

        • Justine @ Little Dove October 5, 2018 at 12:00 am #

          I think so! The squares are a decent size.

          • Galina October 5, 2018 at 5:22 am #

            Thank you for your help!

  16. Lisa Clausen November 12, 2018 at 3:14 pm #

    Hi Justine,

    This is amazing! I found this on Pinterest after getting a quote from our local cake shop for $85 for a 7″ cake, yikes! Can you link the rings you bought? Are they from Amazon? Thank you in advance!

    • Justine @ Little Dove November 12, 2018 at 8:52 pm #

      Oh yay, I’m so glad you found this helpful! The rings I bought are from Amazon! I can’t post the link in the comments, but I shared them at the bottom of the post under where I wrote “where do you get your cakes from?” Let me know if you have any other questions!

  17. Abby February 13, 2019 at 7:03 am #

    Late to the comment party, pun intended. Hopefully this may help with planning!
    Former cake decorator with major Midwest chain grocery store. My number may be off a bit, but here’s the breakdown of sheet cakes and servings. Scored cakes should have 2×2 inch pieces.
    1/4 (quarter) sheet 24ish servings
    1/2 (half) sheet 48ish servings
    Full sheet 98ish servings

    • Justine @ Little Dove February 13, 2019 at 1:14 pm #

      Thank you Abby! Yep, I believe the Costco cakes are half sheets and have 48 pieces!

  18. Gina Hidalgo February 26, 2019 at 9:22 am #

    I’ve never thought about using the scores. What a great idea! I always get a plain cake from Costco, and then order an edible cake topper on Etsy or Amazon. It looks like an expensive cake, and tastes even better! 😉

    • Justine @ Little Dove February 26, 2019 at 11:29 am #

      Great idea Gina! Their cakes are fantastic and I bet that always looks great!

  19. Angela March 31, 2019 at 12:50 pm #

    We don’t have a Costo but we do have a Sam’s club. For my in laws 50th anniversary I ordered white cupcakes and white cake and decorated them myself with 50th anniversary paper cut out I made with my cricut and toothed picks. It turned out amazing. The cakes from Sam’s club are always moist and everyone raved about them.

    • Justine @ Little Dove March 31, 2019 at 1:01 pm #

      That is a great idea! Costco did cupcakes for awhile, I wish they would again.

  20. Christina May 5, 2019 at 9:52 pm #

    My son’s birthday is in October when Costco usually has a spider/web decorating option. I have ordered a cake with “web only-no spider” and then added a Spider-Man cutout from the birthday invitations. Voila! Spider-Man cake!

  21. Kaylee Wyatt July 30, 2019 at 6:13 pm #

    Hello I plan on doing this for my daughter’s birthday coming up! But with a vampirina theme. I plan on doing white frosting with hopefully a purple/black border and I’m ordering an edible topper image! But my question to you is, is the white or chocolate cake better? I’ve never had Costco cake but everyone says its amazing so that’s what we will do this year! Usually I love chocolate but everyone says the vanilla is better.

    • Justine @ Little Dove July 31, 2019 at 6:42 am #

      Honestly, they’re both good! We almost always order a chocolate cake with the vanilla filling and vanilla frosting.

  22. Judy October 18, 2019 at 9:07 am #

    Great post! Thanks! I love hacks. One year for my daughter’s 4th birthday we requested the dino cake at costco and put in notes for a Pink dinosaur rather than the blue in photo. Everyone loved the cake!

  23. Lorri November 18, 2019 at 11:39 am #

    Such an Awesome Idea I just purchased an I decorated one from our local Costco and U plan on putting an edible image on it.. Thank you for the idea.

  24. Gabrielle Arruda March 30, 2020 at 11:05 am #

    Love this idea! Need to try it for my next cake need !

    Gabrielle

    http://www.gabriellearruda.com

  25. Diane March 12, 2022 at 2:20 pm #

    I had a party for a friend who loves lemon. Ordered the white scored cake from Costco. They doubled the height of the scores & I filled each square with lemon curd. She loved it!

  26. angelene fortunate March 29, 2022 at 7:30 am #

    How many squares are on each cake? Great idea!

    • Justine @ Little Dove March 29, 2022 at 10:01 am #

      I believe that it’s 8 across and 6 down, for a total of 48 squares. Thanks for reading and commenting!

  27. Diane April 10, 2022 at 4:10 pm #

    Thanks for your idea. We had a birthday for one of our gal golfers & had to pull it together in a rush. She loves white cake & anything lemon so I asked Costco to score the cake & when I explained that I was going to fill each square with lemon curd, they said they would score it twice to build up each piece to hold the filling. Wow…awesome service & the cake was a huge hit served with extra curd to drizzle. For $20, why would you go anywhere else!

  28. Aunna August 19, 2022 at 7:33 am #

    This is BRILLIANT! Using this for my daughter’s 1st Birthday in a few weeks!

  29. Md Abdur Rahman Sabbir July 17, 2023 at 12:12 am #

    I loved this cakes very much.Its too delicious.Such a cute idea! I love how accommodating the Costco bakery is!

  30. Diane S November 23, 2023 at 1:58 pm #

    After reading your tip, I ordered a white cake for an adult birthday with double scoring (one on top of the 1st one). This way, the scoring was extra tall & I filled each square with lemon curd (birthday girl’s favorite flavor). Served excess curd on the side if people wanted more. Big hit!

    • Justine @ Little Dove December 11, 2023 at 11:27 pm #

      Yum! We’ve done lemon curd as well and I agree—it’s a great choice! Thanks for leaving a comment and letting me know how you liked it!

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